A quarter turn is 90° and is called a right angle. A half turn is 180° and is known as a straight angle (or angle on a straight line). A three-quarter turn is 270°. An acute angle is less than ...
VO: Ambrose is an apprentice pizza maker at the world famous Grecian ... pizzas with toppings of various angles around the circle. He makes right angles, acute angles and we learn how angles ...
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