8
Answer: DSet 2: Triangles
Explanation
Jacob designs triangular earrings. Each earring has two equal sides of 10 miles and a base of 10 miles. What is the perimeter of one earring?
A.
20
B.
15
C.
40
D.✓ Correct
30
Detailed Explanation
Choice D is correct. An isosceles triangle has two equal sides. 1. Two equal sides: 2 × 10 = 20 miles Base: 10 miles Perimeter: 20 + 10 = 30 miles Therefore, the perimeter is 30 miles.
Key Steps:
•
The correct answer is 30
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.
C: This would give an incorrect result. Choice C is incorrect and may result from a calculation error.
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