Number 1. based on the marks, what can you assume to be true in each figure?

These marks are used in geometry to symbolize congruence. If two sides or two angles are congruent, they are assigned with the same symbol.

A. Side AD is congruent to Side  CB
B. Side HE is congruent to side HG. Side EF is congruent to Side GF.
C. The base angles are congruent. 
D. Side QF is congruent to Side MN, and Side QM is congruent to Side PN. The shape is a rectangle.

The number would be 21 because if you add 5+37 then divide by 2.Younwill get the answer