Question

XZ=n, WZ=2x-5, and the perimeter of ΔXWZ is 20. What is the value of n?

a.5
b.7
c.3
d.6

Answer 1

d.

Explanation:

Since it's an isosceles triangle, WX=WZ= 2n-5

Perimeter = n + (2n-5) + (2n-5)

= 5n - 10

The Perimeter is given to be 20

5n - 10 = 20

5n = 30

n = 6