An angle is the amount of turn between two lines. Angles are measured in degrees with the symbol °. Angles can be labelled with 3 letters (eg DEF) to show which angle is being referred to.

This point is called the vertex. Angles measure the size of a turn in degrees. You can show degrees using the symbol ° after the number of degrees. Imagine two lines acting like the hands of a clock.

The symbol that represents corresponding angles ... This angle bisector between two arms at 90 degrees (right angle) makes it easier to see how the inverse angles are complementary instead of ...