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# Two angles that add up to be exactly 90 degrees are said to be

QUESTION POSTED AT 26/03/2020 - 02:34 PM

Complementary
The way I remember it complementary starts with a C and supplementary start with the letter S and in the alphabet C comes before S and numbers the 90 is first before 180 that's How you can remember that C is 90 and supplementary 180

## Related questions

### What is the GCF of 42 and 90

GCF of 42 and 90

a simple way to find the GCF is to decompose 42 & 90 into appropriate factors:

42 = 2 x 3 x 7  & 90 = 2 x 3² x 5

What is the GCF of the above: It's the product of COMMON FACTORS raised at the smallest power:

COMMON FACTOR are 2 x 3 (these are the COMMON raised to the smallest power. Notice I disregarded 3²) so the GCF = 2 x 3 = 6

ANSWERED AT 28/03/2020 - 07:17 PM

QUESTION POSTED AT 28/03/2020 - 07:17 PM

### What are the median and mode of the data set? 70, 80, 90, 100, 100, 50, 50, 100 A. median = 85 and mode = 100 B. median = 85 and mode = 50 C. median =

First, you need to put the numbers in order

50, 50, 70, 80, 90, 100, 100, 100

Mean: 80
Median: 85 (80+90=170/2= 85)
Range: 50
Mode: 100, appeared 3 times
Largest Number: 100
Smallest Number:50
Sum of all numbers: 640
Number Count: 8

edian: 85 and Mode: 100
Hope this helps!!

ANSWERED AT 28/03/2020 - 12:58 PM

QUESTION POSTED AT 28/03/2020 - 12:58 PM

### If the measure of angle 4 is 132°, what is the measure of angle 7?

Angles 1, 3, 5, 7, 9 and 11 are corresponding while angles 2, 4, 6, 8, 10 and 12 are corresponding
angles 8 and 7 are supplementary
since 4 and 8 are corresponding, angle 4 is 132° so angle 8 would also be 132°
180-132=48
°
angle 7 would be 48
°

ANSWERED AT 28/03/2020 - 12:55 PM

QUESTION POSTED AT 28/03/2020 - 12:55 PM

### One of the angles of a parallelogram is equal to 40°. Find the rest of the angles.

Is there some type of image for this?

ANSWERED AT 28/03/2020 - 12:55 PM

QUESTION POSTED AT 28/03/2020 - 12:55 PM

### Ιғ a cιrcle нaѕ a radιυѕ oғ 12 cм and a ѕecтor deғιned вy a 120 degree arc, wнaт ιѕ тнe area oғ тнe ѕecтor

120
times 12 - 360
it should give you the right answer if you solve the problem like that

ANSWERED AT 28/03/2020 - 12:46 PM

QUESTION POSTED AT 28/03/2020 - 12:46 PM

### Peter is overweight. He is 105 kg. His aim is to lose 500 g per week. If he manages this, how many weeks will it be until he is 90 kg?

It would take 1 week and 6 days.

ANSWERED AT 28/03/2020 - 12:36 PM

QUESTION POSTED AT 28/03/2020 - 12:36 PM

### Theo builds the first layer of a rectangular prism using 4 unit cubes. he adds 3 more layers of 4 unit cubes each. how many unit cubes does he use for the prism?

First you multiply 3 and 4 to get 12, then add 4 to get 16. There is also another way to do it you can draw a picture of 4 blocks then add 3 more of the 4 blocks then add one more of the 4 blocks to get 16. 16 is the answer! Hope this helped ( :

ANSWERED AT 28/03/2020 - 12:36 PM

QUESTION POSTED AT 28/03/2020 - 12:36 PM

### A figure has 2 pares of parallel sides, 2 pairs of sides of equal length, and 4 right angles. What quadrilateral best describs this figure?

Rectangle, square, or rhombus

ANSWERED AT 28/03/2020 - 12:31 PM

QUESTION POSTED AT 28/03/2020 - 12:31 PM

### Henry recorded the temperature at noon. Then it fell 6 degrees to 17 C. What was the temperature at noon?

23 (degrees) C
Because if you use        X-6+17     you need to solve for x
or you could just do the problem backwards... 17+6+x, and 17+6=23  so x =23 C

ANSWERED AT 28/03/2020 - 12:30 PM

QUESTION POSTED AT 28/03/2020 - 12:30 PM

### Find the unknown angle measures

Obtuse(sorry I can't find the other one)

ANSWERED AT 28/03/2020 - 12:29 PM

QUESTION POSTED AT 28/03/2020 - 12:29 PM

### Scarlett is trying to find the height of a dam. She stands 90 meters away from the dam and records the angle of elevation to the top of the dam to be 26º. Scarlett's height is 1.65 meters, so the height of the dam is meters.

Height of the dam is 45.45 meters.

Step-by-step explanation:

From the attached figure, AB is the height of dam NM is Scarlett's height. We have to find the height of the dam. NM = CB = 1.65 m

Using trigonometric equations as:

AC = 43.8 m

So, the height of the dam is AC + CB = 43.8 m + 1.65 m = 45.45 m

Hence, the height of the dam is 45.45 meter.

ANSWERED AT 28/03/2020 - 12:28 PM

QUESTION POSTED AT 28/03/2020 - 12:28 PM

### Anna adds (8x + 12y) and (ax − 6y). If the correct answer is 5x + 6y, what is the value of a? A) −3 B) −5 C) 13 D) 3

A) -3

Step-by-step explanation:

Given,

When (8x + 12y) is added to (ax − 6y) the answer is (5x + 6y)

( By combining like terms )

By comparing,

Hence, the value of x is -3,

Option A is correct.

ANSWERED AT 28/03/2020 - 12:27 PM

QUESTION POSTED AT 28/03/2020 - 12:27 PM

### Which shows how to find the horizontal distance between (3, 4) and (8, 4)? A. Subtract y-values: 4 – 4 = 0 units. B. Add y-values: 4 + 4 = 8 units. C. Subtract x-values: 8 – 3 = 5 units. D. Add x-values: 8 + 3 = 11 units.

I think the answer is C

ANSWERED AT 28/03/2020 - 12:25 PM

QUESTION POSTED AT 28/03/2020 - 12:25 PM

### Find the range of the data. Scores: 90, 89, 87, 79, 89, 84, 80, 85, 85, 79 a.11 b.12 c.7 d.15

ANSWERED AT 28/03/2020 - 12:21 PM

QUESTION POSTED AT 28/03/2020 - 12:21 PM

### PLEASE HELP!!!!!!!!!!!!!!!!!!!!!! WILL GIVE BRAINLIEST AND THANKS AND RATING!!!!!!!!!!!!! The line plot shows the daily high temperature in two cities over 10 days. Which conclusion can be drawn from the data? City 1 is generally much warmer than City 2. The weather is generally sunnier in City 2. City 2 had less 80 degree days than City 1. The variation in the daily high temperature is generally greater in City 1.

Answer: Option B. the weather is generally sunnier in City 2.

Step-by-step explanation: if you look at the line plots city 2 has more warm weather than city 1 does and if you also look city 2 does have a least one day with 80 degrees where as city 1 does not even have one day with 80 degrees.

ANSWERED AT 28/03/2020 - 12:10 PM

QUESTION POSTED AT 28/03/2020 - 12:10 PM

### When creating the largest hexagon possible inside a circle, Gregg uses a compass to divide the circumference into six equal arcs. Which measurement is used to set the distance on the compass? A. the circumference of the circle B. the angle that measures 60 degrees C. the diameter of the circle D. the radius of the circle

A. the circumference of the circle

ANSWERED AT 28/03/2020 - 12:08 PM

QUESTION POSTED AT 28/03/2020 - 12:08 PM

### Find the measure of the complement of an 18 degree angle

Step-by-step explanation:

ANSWERED AT 28/03/2020 - 12:02 PM

QUESTION POSTED AT 28/03/2020 - 12:02 PM

### Kim states, "If the diagonals of a parallelogram form right angles, then the parallelogram is a rectangle." Decide if her statement is true or false. A. True B. False

false apex

Step-by-step explanation:

ANSWERED AT 28/03/2020 - 11:30 AM

QUESTION POSTED AT 28/03/2020 - 11:30 AM

### If the arc length of a sector in the unit circle is 3 radians, what is the measure of the angle of the sector?

Well you see you take the sector and tie it 3 times the radiants which will then answer the question that you seek from within the depths of bones and minds.

ANSWERED AT 28/03/2020 - 11:29 AM

QUESTION POSTED AT 28/03/2020 - 11:29 AM

### In RST, RS = 11, RT = 9, and ST = 6. Which angle of RST has the smallest measure?

Angle R

Step-by-step explanation:

RST is a triangle with sides RS = 11, RT = 9 and ST = 6.

To find the measure of the angles we need to use cosines law.

The cosines law is written as c² = a² + b² -2ab(cosC) where a,b,c are sides of the triangle and C is the angle opposed to side c.

• First we are going to find the angle RST using cosines law:

9²= 11²+6²-2(11)(6)(cosS)

81 = 121 + 36 -132cosS

81= 157 -132cosS

132cosS = 157 - 81

132cosS = 76

cosS = 76/132

cosS=.5757

S = 54.85

• Using the same method we're going to find the angle STR

11²= 6²+9²-2(6)(9)cosT

121= 36 + 81 -108cosT

121 = 117 -108cosT

108cosT= 117-121

cosT = -4/108

cosT = .0370

T= 87.88

• And finally solving for the angle SRT:

6²= 11² + 9² -2(11)(9)cosR

36 = 121 + 81 -198cosR

36 = 202 - 198cosR

198cosR = 202 -36

198cosR = 166

cosR = 166/198

cosR = 0.8383

R = 33.04

Therefore, we can conclude that the smallest measure is the one from angle R (∠SRT)

ANSWERED AT 28/03/2020 - 11:22 AM

QUESTION POSTED AT 28/03/2020 - 11:22 AM

### Which strategy best explains how to solve this problem? Claire bought a cup of coffee and two magazines each Saturday. The coffee cost $2.50 and the magazines cost$3.99 each. What is the total amount of money that Claire had spent after 7 Saturdays? A. Work backward. Start with the price of a two magazines ($7.98). Add the cost of a cup of coffee and then divide by 7. B. Make a table. Write the numbers 1 to 7 in the top row of the table (the number of Saturdays). In the first box on the second row write$10.48. This is how much Claire spends on 1 Saturday. In each of the next boxes on the second row, write the amount Claire spends by adding $10.48 to each previous amount. The answer in box 7 is the total amount Claire spent after 7 Saturdays. C. Guess and test. Guess that Claire spent$75. Multiply $3.99 by 2. Then add that answer to$2.50. Divide this answer into 75. If the answer is not 7, then revise your guess, and test your answer again.

B is the best strategy. (You mentioned an option D, but it's not shown in your question!!)

ANSWERED AT 28/03/2020 - 11:21 AM

QUESTION POSTED AT 28/03/2020 - 11:21 AM

### 31) Each test grade in Sara's science class counts for 1/6 of the final grade. The final exam counts for 1/2. Sara's test scores are 72, 84, and 90. Her final exam score is 90. What is Sara's final grade for the class?

Add up all of the first three scores and divide them by 3.
You should get 82.
Then do 82+90 and divide that by 2
You should get 86.

ANSWERED AT 28/03/2020 - 11:20 AM

QUESTION POSTED AT 28/03/2020 - 11:20 AM

### Given the following point on the unit circle, find the angle, to the nearest tenth of a degree, of the terminal side through that point, 0≤θ<360. P=(-1,0)

Look at a unit circle and find the point (-1,0), we see that it is 180 degrees

ANSWERED AT 28/03/2020 - 11:17 AM

QUESTION POSTED AT 28/03/2020 - 11:17 AM

### What is the sum of the angles of an octagon?

Formula for calculating angles in a polygon (Shape with 4 or more sides) is (n-2) x 180, where n is the number of sides on the shape. Octagon has eight sides, so you subtract it by 2, which is 6. Multiply that by 180 to get 1080, which is the sum of the angles.

ANSWERED AT 28/03/2020 - 11:15 AM

QUESTION POSTED AT 28/03/2020 - 11:15 AM

### Kite PQRS is dilated to form kite LMNO what corresponding angle QRS type the answer in the box below

I also believe the answer is MNO, But I am unsure as my method seems to simple.
PQRS
LMNO
QRS=MNO because they match up, which means if they are similar shapes the points should also match up when drawn. Because similar shape have congruent Angles then QRS must be equal to MNO

ANSWERED AT 28/03/2020 - 11:12 AM

QUESTION POSTED AT 28/03/2020 - 11:12 AM

### How to calculate the sum of interior angles of 10 sided polygon

There is a formula for this but you can do it by working out the exterior angle of a regular polygon - the sum of these = 360 degrees for any polygon.
so for a 10 sided polygon ext angle = 360 / 10 = 36  and so the interior angle will be 180-36 = 144 degrees
Sum of all interiors = 144 * 10 = 1440 degrees

ANSWERED AT 28/03/2020 - 11:07 AM

QUESTION POSTED AT 28/03/2020 - 11:07 AM

### Morgan rewrote the expression 90+(10+4.8)as(90+10)+4.8 How will this change the work that is needed to evaluate the expression

Step-by-step explanation:

When evaluating expressions, we follow the order of operations:

P (parentheses); E (exponents); M/D (multiplication/division from left to right); and A/S (addition/subtraction from left to right).  The first thing we look for is parentheses.

When we use the associative property as Morgan did to rearrange the problem, this changes the order we begin in.  It does not, however, change the answer.

ANSWERED AT 28/03/2020 - 11:06 AM

QUESTION POSTED AT 28/03/2020 - 11:06 AM

### Find the sine ratio of angle Θ. Hint: Use the slash symbol ( / ) to represent the fraction bar, and enter the fraction with no spaces.

Hypotenuse = 17
opposite = 15

sin(theta) = opposite / hypotenuse

= 15/17

ANSWERED AT 28/03/2020 - 11:02 AM

QUESTION POSTED AT 28/03/2020 - 11:02 AM

### Cara computes the mean and variance for the set 87, 46, 90, 78, and 89. She finds the mean to be 78. Her steps for finding the variance are shown below.

We have already the value of mean which is equal to 78. Then we can solve for the variance such as shown below:
Variance = (87-78)²+ (46-78)² + (90-78)² +(78-78)² + (89-78²) / 5
Variance = 274

ANSWERED AT 28/03/2020 - 11:02 AM

QUESTION POSTED AT 28/03/2020 - 11:02 AM

### A building that is 100 ft tall casts a shadow that makes a 30 degree angle with the ground. Approximately how long, in feet, is the shadow across the ground?

100 is how long the shadow would be.

To solve, remember the ratio for a 30/60/90 triangle:
short side = x
long side = x
hypotenuse = 2x

the short side is the building, which is 100, so the long side is 100

ANSWERED AT 28/03/2020 - 11:00 AM

QUESTION POSTED AT 28/03/2020 - 11:00 AM