3 years ago

Find the measure of c. A. 40 B. 70 C. 90 D. 50

Mathematics

1 answer:

Juliette [100K]3 years ago

4 0

Answer:

D. 50

Step-by-step explanation:

a = 90° (angle subtended in semicircle)

a + c + 40° = 180° (by angle sum postulate of a triangle)

90° + c + 40° = 180°

c + 130° = 180°

c = 180° - 130°

c = 50°

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