10
Answer: DSet 3: Triangles
Explanation
A triangular picture frame has sides measuring 25 centimeters and 21 centimeters. If the total perimeter is 71 centimeters, find the length of the third side.
A.
12
B.
35
C.
15
D.✓ Correct
25
Detailed Explanation
Choice D is correct. The perimeter of a triangle is the sum of all three sides. 1. Total perimeter: 71 centimeters Two known sides: 25 + 21 = 46 centimeters Third side: 71 - 46 = 25 centimeters Therefore, the third side is 25 centimeters.
Key Steps:
•
The correct answer is 25
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.
🎉 Set Complete!
You've reviewed all explanations. Ready to try another set?
🎯 Keep Practicing!
Master all sections for your best SAT score