an angle measures exactly ninety degrees
A right angle
An angle measuring exactly 90 degrees is a right angle.
No! Because an acute angle is less than ninety degrees, and a right angle is exactly ninety degrees.
Two acute angles and two obtuse angles. If you do not know what these angles are, I will show you. An acute angle is an angle that has less than 90 degrees on your protractor (Shaped like a semi-circle. Found in a mathematical set). An obtuse angle has more than ninety degrees. An angle with ninety degrees is a right angle.
An acute angle is an angle that is less then ninety degrees eg 45 degrees.
An acute angle is between zero and ninety degrees.
A right angle which is ninety degrees or 360 degrees which is a revolution.
It is a right angle triangle and its 3rd angle is 70 degrees.
A right angle. Ninety degrees. Put more simply, but that answer is the correct one, look at a square, a real square, and then at the corner...that is a right angle, ninety degrees, square angle.