2
Answer: CSet 5: Triangles
Explanation
A triangular running track has one side of 8 feet and another of 18 feet. If one complete lap is 41 feet, what is the length of the third side?
A.
7
B.
5
C.✓ Correct
15
D.
25
Detailed Explanation
Choice C is correct. The perimeter of a triangle is the sum of all three sides. 1. Total perimeter: 41 feet Two known sides: 8 + 18 = 26 feet Third side: 41 - 26 = 15 feet Therefore, the third side is 15 feet.
Key Steps:
•
The correct answer is 15
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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