Question

In triangle JKL what is the value of x° if JK = KL

A) 38°
B) 60°
C) 69°
D) 71°

Answer 1

A: 38º

Explanation:

Triangle JKL is an isosceles triangle as JK=KL:

• That means ∠J=∠L=71º
• The sum of a triangle's interior angles is 180º, so ∠K=180º-∠J-∠L. We know ∠J=∠L=71º, so ∠K=180º-71º-71º=38