Questlon 39 of 40
In ADEF, Sin D=
What is cos E?
26
26
10

answer: 12

step-by-step explanation:

∠cbe and ∠deb are same-side interior angles.

i took the test

180°

step-by-step explanation:

sum of equilateral triangle=180°

< n=60°

< m=120°°[angle supplementary of equilateral angle]

< m+< r+< x=360°(sum of exterior angle of triangle)