5
Answer: ASet 2: Triangles
Explanation
Alexander is setting up a triangular tent. The two equal support poles are each 20 centimeters long, and the base is 13 centimeters. What is the total length of the tent frame?
A.✓ Correct
53
B.
26
C.
43
D.
63
Detailed Explanation
Choice A is correct. An isosceles triangle has two equal sides. 1. Two equal sides: 2 × 20 = 40 centimeters Base: 13 centimeters Perimeter: 40 + 13 = 53 centimeters Therefore, the perimeter is 53 centimeters.
Key Steps:
•
The correct answer is 53
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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