Which of the following values is equal to − (−3.7)?
−3.7
0
3.7
4 (not it)

#12 find the value of x. #13 find the value of the variable.

1. what is the measure of ∠abc? what is the measure of ∠abd?

Find the measure of the interior angles of the following regular polygons: a triangle, a quadrilateral, a pentagon, an octagon, a decagon, a 30-gon, a 50-gon, and a 100-gon.