3
Answer: CSet 1: Triangles
Explanation
Emma designs triangular earrings. Each earring has two equal sides of 13 feet and a base of 12 feet. What is the perimeter of one earring?
A.
48
B.
28
C.✓ Correct
38
D.
19
Detailed Explanation
Choice C is correct. An isosceles triangle has two equal sides. 1. Two equal sides: 2 × 13 = 26 feet Base: 12 feet Perimeter: 26 + 12 = 38 feet Therefore, the perimeter is 38 feet.
Key Steps:
•
The correct answer is 38
Why others are wrong:
A: This would give an incorrect result. Choice A is incorrect and may result from a calculation error.
B: This would give an incorrect result. Choice B 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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