Just have a look at the edges of your desk; the hands of a clock or the keys on your ... As well as right angles, there are also acute and obtuse angles. An acute angle is very easy to spot ...

An acute angle is less than 90 ... There are 360° in a full turn. The hour hand of a clock make a full 360° turn for each hour of the day. You can use a tool called a protractor to measure ...