Question

Find x if QRSTU is a regular pentagon.
(8x + 12)

Answer 1

x = 66°

Explanation:

Sum of the angles of a pentagon is 540°. So, set the expression equal to that and solve for x:

`8x + 12 = 540`

`x = (540-12)/(8) = 66`

Thus, x = 66°.