5
Answer: BSet 5: Triangles
Explanation
In a triangular roof design, two of the angles measure 49° and 39°. What is the measure of the third angle?
A.
46
B.✓ Correct
92
C.
102
D.
82
Detailed Explanation
Choice B is correct. The sum of angles in a triangle is always 180°. 1. Two known angles: 49° + 39° = 88° Third angle: 180° - 88° = 92° Therefore, the third angle is 92°.
Key Steps:
•
The correct answer is 92
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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