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#
In the following diagram what is the value of *x*?

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A
45°
*x*:
x = 180 - 90 - 45
x = 45°

Explaination

When added, the interior angles of a triangle will equal 180°. From the question and the diagram, we state this property as:
90 + 45 + x = 180
Solving for
B 15°

C 90°

D 60°

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