Finding the Missing Angle in a Triangle

In a right triangle, one of the angles measures $30^{ ext{o}}$. What is the measure of the other acute angle in the triangle?

Recall that the sum of the angles in any triangle is always $180^{ ext{o}}$. Since one angle is a right angle ($90^{ ext{o}}$), you can find the remaining angle by subtracting the measures of the known angles from $180^{ ext{o}}$.