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Elina [12.6K]
3 years ago
6

10. What is the measure of angle C? A. 25° B. 30° C. 60° D. 75°

Mathematics
1 answer:
Reil [10]3 years ago
8 0

Answer:

D

Step-by-step explanation:

x + 5 + 3x + C = 180                All triangles have 180 degrees.

4x + 5 + C = 180

But C must be equal to 3x. Notice the markings on the lets of the triangle.

4x + 5 + 3x = 180

7x + 5 = 180                          Subtract 5 from both sides

7x = 180 - 5

7x = 175

x = 25

But angle C = 3x

C = 3*25

C = 75

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