3
Answer: DSet 4: Triangles (Intermediate)
Explanation
PROBLEM
Recent studies show that an equilateral triangle has a perimeter of 15. What is the length of each side?
An equilateral triangle has a perimeter of 15. What is the length of each side?
A.
6
B.
3
C.
2
D.✓ Correct
5
Detailed Explanation
[Variation 1] Choice D is the best answer. Each side = 15 / 3 = 5
Why others are wrong:
A: 6 is incorrect because it does not satisfy the equation.
B: 3 is incorrect because it does not satisfy the equation.
C: 2 is incorrect because it does not satisfy the equation.