5
Answer: DSet 5: Triangles
Explanation
Victoria wants to build a triangular fence for a park. Two sides measure 12 centimeters and 22 centimeters. If Victoria has exactly 49 centimeters of fencing material, what must be the length of the third side?
A.
7
B.
25
C.
5
D.✓ Correct
15
Detailed Explanation
Choice D is correct. The perimeter of a triangle is the sum of all three sides. 1. Total perimeter: 49 centimeters Two known sides: 12 + 22 = 34 centimeters Third side: 49 - 34 = 15 centimeters Therefore, the third side is 15 centimeters.
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.
C: This would give an incorrect result. Choice C is incorrect and may result from a calculation error.
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