# Circle Vocab

### 18 terms by lajollabird89

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### center

the set of all points in a plane that are equidistant from a given point

the distance from the center to a point on the circle

### congruent circles

two circles with the same radius

### chord

a segment whose endpoints are points on the circle

### secant

a line that intersects a circle in two points

### diameter

a chord that passes through the center of the circle, distance across the circle

### tangent

a line in the plane of a circle that intersects the circle in exactly one point

### tangent circles

coplanar circles that intersect in one point

### concentric circles

coplanar circles that have a common center

### common tangent

a line or segment that is tangent to two coplanar circles

### interior of a circle

consists of the points inside the circle

### exterior of a circle

consists of the points outside the circle

### point of tangency

the point at which a tangent line intersects the circle to which it is tangent

says that the measure of an arc formed by two adjacent arcs is the sum of the measures of the two arcs

### inscribed angle

an angle whose vertex on a circle and whose sides contain chords of the circle

### intercepted arc

the arc that lies in the interior of an inscribed angle and has endpoint on the angle

### tangent segment

is tangent to a circle at one of its endpoints

tangent circles

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