Question 1044760
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The angles are x, 3x, and 4*(3x) = 12x.

The sum of angles is x + 3x + 12x = 16x.

From the other side, it is 180 degs.

Hence, 16x = 180 degs.

It implies x = {{{180/16}}} = {{{45/4}}} degs.

Having this, calculate the angles.
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