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Vocab for Circles

Mr. Ross

Vocabulary for parts and terms related to circle.

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3.If two segments from the same point are tangent to a circle than they _____________ to each other.
4.An arc with a measure greater than 180 degrees. It is named with 3 letters. (2 Words)
5.This angle is half the measure of the arc it intercepts. (2 Words)
8.A polygon that is inside a circle if each of the its vertices lie on the circle.
11.A chord of a circle that goes through the center. Also twice the distance of the radius.
12.Any segment with endpoints that are on the circle
18.Circles that share the same center. (2 Words)
19.Symbol for the ratio of circumference/diameter. Usually rounded to 3.141
20.When a circle contains all the vertices of a polygon. Equation is 2(pi)(r) or d(pi)
22.In a circle, a line that intersects a circle in exactly one point.
23.An angle that has the center as its vertex and the two sides are radii of the circle. (2 Words)
24.A.The endpoints of the arc lie on the angle B. All points of the arc except the endpoints are in the interior of the circle. C. Each side of the angle contains an endpoint of the arc.
1.The point where a tangent and circle meet. (3 Words)
2.The measure of an arc formed by two adjacent arcs is the sum of the measure of the two arcs. (3 Words)
6.The distance around a circle.
7.An arc with a measure less than 180 degrees. It is named with two letters. (2 Words)
9.the proportion to find this distance is A/360 = length/circumference (2 Words)
10.a part of the circle that is defined by two endpoints
13.If a line is tangent to a circle then it is _______________ to the radius.
14.A segment from the center of a circle to the circle. Also half the distance of the diameter.
15.Any line that intersects a circle in exactly two points.
16.An arc that measures 180 degrees.
17.The drawing of all point in a plane equidistant from a given point.
21.A point equidistant from all points in a circle.

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