4
Answer: DSet 5: Triangles (Intermediate)
Explanation
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.✓ Correct
10
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.