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Area of a Triangle

In a triangle...

Question

In a triangle, the measures of the angles are x, x + 20 and 2x what is the value of x?

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Solution

The angles of triangle is $x, x + 20, 2 x$
By angle sum property
Sum of all angles is equal to $180$
$x + x + 20 + 2 x = 180 4 x = 180 - 20 4 x = 160 x = 40$

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