4

Set 5: Triangles (Intermediate)

Explanation

Answer: D

PROBLEM

Intriguingly, an equilateral triangle has a perimeter of 30. What is the length of each side?

An equilateral triangle has a perimeter of 30. What is the length of each side?

A.

13

B.

8

C.

7

D.

10

✓ Correct

Detailed Explanation

[Variation 2] Choice D is the best answer. Each side = 30 / 3 = 10

Why others are wrong:
A: 13 is incorrect because it does not satisfy the equation.
B: 8 is incorrect because it does not satisfy the equation.
C: 7 is incorrect because it does not satisfy the equation.