Question

17. What is the value of x in the rhombusbelow?AC(x+40)B3x"D

Answer 1

Remember that

In a rhombus, diagonals bisect each other at right angles (perpendicular)

so

that means

(x+40)+(3x) =90 degrees ---------> by complementary angles

solve for x

4x+40=90

4x=90-40

4x=50

x=12.5