| A | B |
|---|
| angle | two rays that share an endpoint |
| vertex | the endpoint of an angle |
| sides | the rays that go out from the endpoint of the angle |
| degrees | the measurement of the interior of an angle |
| acute angle | an angle that measures less than 90 degrees |
| right angle | an angle that measures exactly 90 degrees |
| obtuse angle | an angle that measures more than 90 degrees |
| straight angle | an angle that measures exactly 180 degrees |
