1
Answer: DSet 4: Triangles
Explanation
William's triangular garden has two sides of 6 miles and 19 miles. The total border length is 40 miles. How long is the remaining side?
A.
5
B.
7
C.
25
D.✓ Correct
15
Detailed Explanation
Choice D is correct. The perimeter of a triangle is the sum of all three sides. 1. Total perimeter: 40 miles Two known sides: 6 + 19 = 25 miles Third side: 40 - 25 = 15 miles Therefore, the third side is 15 miles.
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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