Let x be the measurement of one of the acute angles.
Let 3x be the measurement of the third angle.
We know that the sum of all the interior angles of a triangle is 180 degrees so we should add all the variables and equate them to 180 and we get:
3x + x + x = 180
(Note that each x represents the angle of congruency)
5x = 180
x = 36
The measurement of the acute angles is 36 degrees.
To solve for the measurement of the third angle, substitute the value of x, which is 36, to 3x.
3(36) = 108.
The third angle's measurement is 108 degrees.