3
Answer: CSet 1: Triangles
Explanation
Sarah designs triangular earrings. Each earring has two equal sides of 19 meters and a base of 13 meters. What is the perimeter of one earring?
A.
61
B.
25
C.✓ Correct
51
D.
41
Detailed Explanation
Choice C is correct. An isosceles triangle has two equal sides. 1. Two equal sides: 2 × 19 = 38 meters Base: 13 meters Perimeter: 38 + 13 = 51 meters Therefore, the perimeter is 51 meters.
Key Steps:
•
The correct answer is 51
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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