9
Answer: BSet 2: Triangles
Explanation
Emily's triangular garden has two sides of 16 yards and 23 yards. The total border length is 49 yards. How long is the remaining side?
A.
20
B.✓ Correct
10
C.
5
D.
9
Detailed Explanation
Choice B is correct. The perimeter of a triangle is the sum of all three sides. 1. Total perimeter: 49 yards Two known sides: 16 + 23 = 39 yards Third side: 49 - 39 = 10 yards Therefore, the third side is 10 yards.
Key Steps:
•
The correct answer is 10
Why others are wrong:
A: This would give an incorrect result. Choice A 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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