6
Answer: BSet 3: Triangles
Explanation
Isabella designs triangular earrings. Each earring has two equal sides of 15 feet and a base of 12 feet. What is the perimeter of one earring?
A.
52
B.✓ Correct
42
C.
21
D.
32
Detailed Explanation
Choice B is correct. An isosceles triangle has two equal sides. 1. Two equal sides: 2 × 15 = 30 feet Base: 12 feet Perimeter: 30 + 12 = 42 feet Therefore, the perimeter is 42 feet.
Key Steps:
•
The correct answer is 42
Why others are wrong:
A: This would give an incorrect result. Choice A is incorrect and may result from a calculation error.
C: This would give an incorrect result. Choice C is incorrect and may result from a calculation error.
D: This would give an incorrect result. Choice D is incorrect and may result from a calculation error.
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