# AB is perpendicular to line segment [CF, FH, DH, GH] . If the length of EF is a units, then the length of GH is [a, b, a+b, a-b] units. I need help with this one. If anyone can answer this, thank you in advance. The choices I have are in the "[ ]".

QUESTION POSTED AT 01/06/2020 - 04:07 PM