The measure of the right angle is 90 degrees and the measure of the acute angle is 180 degrees. Thus, when we add the right angle and acute angle the sum of the two angle will always more than the 90 degrees but less than the 180 degrees. Hence, The angle formed by joining an acute and right angle is a obtuse angle.
The given angles in the problem are right angle and acute angle.
Right angle is a angle which measure exactly 90 degrees. When two rays intersect as perpendicular to each other the angle formed by the two rays is a right angle.
Acute angle is the angle which measure less than the 90 degrees. The measure of a acute angle is always between the zero degrees and 90 degrees.
Obtuse angle is a angle which measure more than the 90 degrees but less then the 180 degrees. Thus the angle which measure between the 90 degrees and the 180 degrees is called obtuse angle.
As the measure of the right angle is 90 degrees and the measure of the acute angle is 180 degrees. Thus, when we add the right angle and acute angle the sum of the two angle will always more than the 90 degrees but less than the 180 degrees. Hence, The angle formed by joining an acute and right angle is a obtuse angle.
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