9
Answer: BSet 4: Triangles
Explanation
Olivia designs triangular earrings. Each earring has two equal sides of 7 kilometers and a base of 11 kilometers. What is the perimeter of one earring?
A.
15
B.✓ Correct
25
C.
12
D.
35
Detailed Explanation
Choice B is correct. An isosceles triangle has two equal sides. 1. Two equal sides: 2 × 7 = 14 kilometers Base: 11 kilometers Perimeter: 14 + 11 = 25 kilometers Therefore, the perimeter is 25 kilometers.
Key Steps:
•
The correct answer is 25
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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