10
Answer: ASet 3: Triangles
Explanation
Mia designs triangular earrings. Each earring has two equal sides of 7 inches and a base of 4 inches. What is the perimeter of one earring?
A.✓ Correct
18
B.
28
C.
8
D.
9
Detailed Explanation
Choice A is correct. An isosceles triangle has two equal sides. 1. Two equal sides: 2 × 7 = 14 inches Base: 4 inches Perimeter: 14 + 4 = 18 inches Therefore, the perimeter is 18 inches.
Key Steps:
•
The correct answer is 18
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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