6
Answer: DSet 5: Triangles
Explanation
Tom's triangular garden has two sides of 9 kilometers and 24 kilometers. The total border length is 64 kilometers. How long is the remaining side?
A.
41
B.
21
C.
15
D.✓ Correct
31
Detailed Explanation
Choice D is correct. The perimeter of a triangle is the sum of all three sides. 1. Total perimeter: 64 kilometers Two known sides: 9 + 24 = 33 kilometers Third side: 64 - 33 = 31 kilometers Therefore, the third side is 31 kilometers.
Key Steps:
•
The correct answer is 31
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.
C: This would give an incorrect result. Choice C is incorrect and may result from a calculation error.
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