What could the measure of the acute angles in a right triangle be? 40° and 50°
90° and 90°
25° and 65°
20° and 100°

50 o

Explanation:

The sum of the measure of the internal angles of any triangle is  

180 o .

In a right angled triangle, one angle will be  90 o .

Since we know the measure of one of the other acute (less than  90 o ) angles, we subtract the sum of the two known angles from  180  to calculate the measure of the other acute angle.

180 − ( 90 + 40 )

180 − 130

50