3
Answer: BSet 1: Triangles
Explanation
Abigail wants to build a triangular fence for a park. Two sides measure 14 inches and 17 inches. If Abigail has exactly 39 inches of fencing material, what must be the length of the third side?
A.
4
B.✓ Correct
8
C.
16
D.
18
Detailed Explanation
Choice B is correct. The perimeter of a triangle is the sum of all three sides. 1. Total perimeter: 39 inches Two known sides: 14 + 17 = 31 inches Third side: 39 - 31 = 8 inches Therefore, the third side is 8 inches.
Key Steps:
•
The correct answer is 8
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.
🎯 Keep Practicing!
Master all sections for your best SAT score