Set 3: Triangles (Intermediate)

**Choice C is the best answer.** Perimeter = 10 + 10 + 3 = 23

Explanation

Answer: C

PROBLEM

An isosceles triangle has two equal sides of 10 and a base of 3. What is its perimeter?

A.

22

B.

26

C.

23

✓ Correct

D.

25

Detailed Explanation

Choice C is the best answer. Perimeter = 10 + 10 + 3 = 23

Why others are wrong:

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

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

D: 25 is incorrect because it does not satisfy the equation.