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Learn about angles in triangles and quadrilaterals with this BBC Bitesize Maths article. For students between the ages of 11 and 14.
Angles are based on parts of a full turn, which is 360°. 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 ...
Researchers at Ohio State University have a made a lens that simultaneously takes pictures of an object from nine angles, images which are then combined to make a 3-D one.
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