Question

For which value of x is the figure a rhombus?

A. x = 20.5
B. x = 2.6
C. x = 15.19
D. x = 7

Answer 1

They are right triangles so you with do (8x+7)+(3x+6)=90 because a triangle is 180* so you got this !

Answer 2

D. x = 7

Explanation:

The labeled angles are the acute angles of a right triangle, so they are complementary. Their measures add up to 90 deg.

8x + 7 + 3x + 6 = 90

11x + 13 = 90

11x = 77

x = 7