8
Answer: CSet 1: Triangles
Explanation
James is setting up a triangular tent. The two equal support poles are each 18 centimeters long, and the base is 7 centimeters. What is the total length of the tent frame?
A.
33
B.
21
C.✓ Correct
43
D.
53
Detailed Explanation
Choice C is correct. An isosceles triangle has two equal sides. 1. Two equal sides: 2 × 18 = 36 centimeters Base: 7 centimeters Perimeter: 36 + 7 = 43 centimeters Therefore, the perimeter is 43 centimeters.
Key Steps:
•
The correct answer is 43
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.
D: This would give an incorrect result. Choice D is incorrect and may result from a calculation error.
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