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How to find the value of X?

How to find the value of X?-example-1

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Answer:

84

Explanation:

First, you have to know that since the two sides of the triangle with the red lines, the triangle is isosceles. The two angles on the bottom are therefore equal according to the isosceles triangle theorem. Now you can write the expression 180 -2(48) to find x. 180 is the total amount angle measure of a triangle.

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