How many right angles are there in 540° ?

 Complete:

An angle that is one degree less than a right angle is _____.

At which one of the following times is the angle between the hands of a clock exactly one right angle?

How many right angles make two full rotations?

 What fraction of a straight angle is a right angle?

Complete:

An angle that is one degree more than a right angle is _____.

At which one of the following times is the angle between the hands of a clock exactly one right angle?

How many degrees are there in one right angle?

 How many right angles are there at all the corners of a cube?