A three-quarter turn is 270°. An acute angle is less than 90°. An obtuse angle is between 90° and 180°. A reflex angle is between 180° and 360°. These are all right angles as they are all a ...
Geometry! HA! Who needs it ... Two are acute angles, smaller than 90 degrees. And two are obtuse angles, bigger than 90 degrees. That angle is 65 degrees. Can you work out the others?
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