The ratio of the measures of the sides of a triangle is 3:7:9. If the perimeter of the triangle is 266 inches, find the length o
1 answer:
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Answer:
1.01 × 10⁴ - scientific notation
10,100 - decimal notation
Answer: 142°15'
Explanation:
Supplementary angles are angles that add up to make a straight angle ().
Therefore, we must find the angle ∠B such that
∠A + ∠B = 180° (1)
We know that ∠A = 37°45', so we can re-arrange equation (1) to find the magnitude of ∠B:
∠B = 180° - ∠A = 180° - 37°45' = 142°15'
So, the correct answer is
142°15'