4
Answer: ASet 1: Triangles
Explanation
David is setting up a triangular tent. The two equal support poles are each 10 centimeters long, and the base is 3 centimeters. What is the total length of the tent frame?
A.✓ Correct
23
B.
13
C.
33
D.
11
Detailed Explanation
Choice A is correct. An isosceles triangle has two equal sides. 1. Two equal sides: 2 × 10 = 20 centimeters Base: 3 centimeters Perimeter: 20 + 3 = 23 centimeters Therefore, the perimeter is 23 centimeters.
Key Steps:
•
The correct answer is 23
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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