Question

Given that ABCD is a rhombus, what is the value of x?

A. 28
B. 56
C. 48.5
D. 18
E. 36
F. Cannot be Determined

Answer 1

18

Explanation:

Answer 2

D. 18

Explanation:

∠DAC ≅ ∠BCA and the diagonals cross at right angles, so the two marked angles are complementary.

(5x -18) +x = 90

6x = 108 . . . . . . . . . simplify, add 18

x = 18 . . . . . . . . . . . divide by 6