There are 4 main types of angles.
Acute Angle Right Angle
measures less than 90 measures exactly 90
 |
| The little box tells us that it measures 90 |
Obtuse Angle Straight Angle
measures more than 90 measures exactly 180
Watch this angle change from acute to right to obtuse to straight and back again.
Angles can face all different directions. They don't always look like the ones above. Look at the examples below.
All of these angles are ACUTE angles:
All of these are RIGHT angles:
All of these are OBTUSE angles:
All of these are STRAIGHT angles:
Practice what you learned!
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