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The angle measures of a triangle are shown in the diagram.
What is the value of x?
A. 55
B. 21
C. 11
D. 28

The angle measures of a triangle are shown in the diagram What is the value of x A 55 B 21 C 11 D 28 class=

Respuesta :

We know that all the angles in a triangle should add up to 180. Hence, we can solve it using the following method:

74 + 5x + 4x + 7 = 180

9x + 81 = 180

9x = 99

x = 11


ANSWER: C or 11