2

Set 3: Triangles

Explanation

Answer: A

Nathan designs triangular earrings. Each earring has two equal sides of 19 miles and a base of 10 miles. What is the perimeter of one earring?

A.

48

✓ Correct
B.

58

C.

24

D.

38

Detailed Explanation

Choice A is correct. An isosceles triangle has two equal sides. 1. Two equal sides: 2 × 19 = 38 miles Base: 10 miles Perimeter: 38 + 10 = 48 miles Therefore, the perimeter is 48 miles.

Key Steps:

The correct answer is 48

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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