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Subtend

usgb/səbˈtend/Volume
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Geometry UsagePlay
Used to describe how an angle relates to a shape in geometry, like an arc or line. SlideIn this triangle, the top angle subtends the base.
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Visual ImageryPlay
Imagine drawing lines from the angle's vertex to the endpoints of the arc or side it faces. SlideThis angle subtends a larger arc than that one.
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More Than AnglesPlay
Though commonly associated with angles, other shapes can subtend parts of geometric figures. SlideThe diameter of the circle subtends a semicircle.