10
Answer: ASet 5: Triangles
Explanation
Ryan designs triangular earrings. Each earring has two equal sides of 15 inches and a base of 9 inches. What is the perimeter of one earring?
A.✓ Correct
39
B.
19
C.
29
D.
49
Detailed Explanation
Choice A is correct. An isosceles triangle has two equal sides. 1. Two equal sides: 2 × 15 = 30 inches Base: 9 inches Perimeter: 30 + 9 = 39 inches Therefore, the perimeter is 39 inches.
Key Steps:
•
The correct answer is 39
Why others are wrong:
B: This would give an incorrect result. Choice B 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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