Set 2: Triangles (Intermediate)

**Choice C is the best answer.** Perimeter = 10 + 10 + 5 = 25

Explanation

Answer: C

PROBLEM

An isosceles triangle has two equal sides of 10 and a base of 5. What is its perimeter?

A.

27

B.

22

C.

25

✓ Correct

D.

26

Detailed Explanation

Choice C is the best answer. Perimeter = 10 + 10 + 5 = 25

Why others are wrong:

A: 27 is incorrect because it does not satisfy the equation.

B: 22 is incorrect because it does not satisfy the equation.

D: 26 is incorrect because it does not satisfy the equation.