## Chapter 8 - Geometry Vocabulary

##### Created by:

poppysimpson  on June 16, 2011

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# Chapter 8 - Geometry Vocabulary

 convexA polygon in which all vertices appear to be pushed outward.
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#### Definitions

convex A polygon in which all vertices appear to be pushed outward.
concave A polygon in which at least one vertex appear to be pushed inward.
regular polygon a polygon with congruent sides and angles
area a measure of how much surface an object has
height of a triangle the perpendicular distance from any point to opposite side
circle The set of all points in a plane that are the same distance from a given point called the center
radius The distance from the center of a circle to a point on the circle
diameter A line segment that passes through the center of a circle and has endpoints on the circle
circumference the perimeter of a circle
central angle An angle with a vertex at the center of a circle and whose sides are radii of the circle
sector The part of a circle that looks like a piece of pie. A sector is bounded by 2 radii and an arc of the circle.

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