Question

Quadrilateral ABCD is given with ∡A=35°, ∡B=40°, ∡C=(5x+5)°, and ∡D=(5x)°. What is the value of x?

A. x = 6
B. x = 10
C. x = 28
D. x = 7

Answer 1

C) x = 28

Explanation:

35 + 40 + 5x+5 + 5x = 360

10x + 80 = 360

10x = 280

x = 28