Flashcards
unit 9 vocab
Cards in this deck (12)
- 1—Circle
The set of points in a plane that are fixed distance from a given point called the center of the circle. - 2—Chord
A segment whose endpoints both lie on the same circle.
- 3—Radius
A segment whose endpoints are the center of a circle and a point on the circle.
- 4—Diameter
A segment that has endpoints on a circle and that passes through the center of the circle.
- 5—Secant
A line that intersects a circle at two points.
- 6—Tangent
A line that intersects the circle at exactly one point. The radius is perpendicular to the tangent at the point of tangency.
- 7—Internal Tangent
A tangent that is common to two circles and intersects the segment joining the centers of the circles.
- 8—External Tangent
A tangent that is common to two circles and does not intersect the segment joining the centers of the circles.
- 9—Inscribed Angle
An angle whose vertex is on a circle and whose sides contain chords of the circle. The angle measure of the inscribed angle is 1/2 of the intercepted area.
- 10—Central Angle
An angle whose vertex is the center of a circle.
- 11—Angle Between 2 Chords
The angle between 2 chords is equal to 1/2 the sum of the two intercepted arcs.
- 12—Angle Between 2 Secants
The angle between 2 chords is equal to 1/2 the difference of the two intercepted arcs.
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- 9th grade Math Flashcards on unit 9 vocab, created by Lara Guzel on 07/02/2022.
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- Lara Guzel
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