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20 Cards in this Set
- Front
- Back
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Arc |
A portion of the circumference of a circle. |
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Semicircle |
Half of the circle and the diameter. Should equal 180. |
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Minor arc |
Is the arc of the circle having the measure of less than 180. *shortest are linking 2 points on the circle. |
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Major arc |
Ab are of the circle measuring greater than 180. Longest are linking 2 points. |
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Central angle |
An angle with vertex at the center and with sides that are radii. |
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Inscribed angle |
An angle with vertex on the circle and with sides that are chords. |
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Interior angle |
An angle created by intersecting chords (not at the center) |
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Exterior angle |
An angle created by intersecting secants or secant and tangent. |
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Circumscribed angle |
An angle created by intersecting tangents. |
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What is true for any 2 circles? |
They are similar |
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Congruent circles |
Circles that are equal in terms of radius, diameter , and circumference, and surface area. |
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Circle |
Set of points, that are fixed distance from a given point. |
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Radius |
A segment who’s endpoints are the center of the circle and a point that lies on the center. |
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Diameter |
Segment that has endpoints on the circle and that passes through the center. |
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Chord |
A straight line segment whose endpoints both lie on the circle. |
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Secant |
An infinite line that intersects a circle at 2 points. *infinite extension of a chord |
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Tangent |
Line that intersects the circle at exactly one point. |
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Sector of circle |
A region bounded by 2 radii, of their circle and their intercepted arc. |
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Segment of a circle |
Region bounded by arc and its chord. |
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Arc length |
Distance along the arc measured in linear units. |
