Set 5: Triangles (Intermediate)

**Choice C is the best answer.** Perimeter = 7 + 7 + 5 = 19

Explanation

Answer: C

PROBLEM

An isosceles triangle has two equal sides of 7 and a base of 5. What is its perimeter?

A.

17

B.

16

C.

19

✓ Correct

D.

18

Detailed Explanation

Choice C is the best answer. Perimeter = 7 + 7 + 5 = 19

Why others are wrong:

A: 17 is incorrect because it does not satisfy the equation.

B: 16 is incorrect because it does not satisfy the equation.

D: 18 is incorrect because it does not satisfy the equation.