Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Geometry-Circles
| Question | Answer |
|---|---|
| Define: Chord | A segment whose endpoints lie on a circle. |
| Define: Secant | A line that intersects a circle at two points. |
| Define: Tangent | A line in the exact same plane as a circle that intersects it at exactly one point. |
| Define: Point of Tangency | The point where the tangent and a circle intersect. |
| Define: Congruent Circles | Circles that have congruent radii. |
| Define: Concentric Circles | Coplanar circles with the same center. |
| Define: Tangent Circles | Two coplanar circles that intersect at exactly one point. |
| Define: Common Tangent | A line that is tangent to two circles |
| A line that is tangent to a circle is ________ to the radius. | Perpendicular |
| If two segments are tangent to a circle from the same external point, then the segments are _________. | Congruent |
| Define: Central Angle | An angle whose vertex is the center of a circle. |
| Define: Arc | An unbroken part of a circle consisting of two points called the endpoints and all the points on the circle between them. |
| Define: Minor Arc | An arc whose points are on or in the interior of a central angle. |
| Define: Major Arc | An arc whose points are on or in the exterior of a central angle. |
| Define: Semicircle | An arc that's endpoints lie on a diameter. |
| Define: Adjacent Arcs | Arcs of the same circle that intersect at exactly one point. |
| In a circle, if a radius (or diameter) is perpendicular to a chord, then it ________ the chord. | Bisects |
| Define: Sector of a Circle | A region bounded by two radii of the circle and their intercepted arc. |
| What is the equation for the area of a sector and/or segment? | A=πr^2 (m°/360°) |
| Define: Segment of a Circle | A region bounded by an arc and its chord. |
| Define: Arc Length | The distance along an arc measured in linear units. |
| What is the equation for arc length? | L=2πr(m°/360°) |
| Define: Inscribed Angle | An angle whose vertex is on a circle and whose sides contain chords of the circle. |
| Define: Intercepted Arc | An arc consisting of endpoints that lie on the sides of an inscribed angle and all the points of the circle between them. |
| What is the relationship between the inscribed angle and the intercepted arc? | The intercepted arc is two times bigger than the inscribed angle. |
| Define: Subtends | When a chord or arc's endpoints lie on the sides of the angle. |
| If a quadrilateral is inscribed in a circle, then is opposite angles are...? | Supplementary |
| If the vertex of an angle lies outside the circle, what is it in relation to its intercepted arcs? | Half the difference of the arcs. |
| If the vertex of an angle lies inside the circle, what is it in relation to its intercepted arcs? | Half the sum of the arcs. |
| Define: Secant Segment | A segment of a secant with at least one endpoint on the circle. |
| Define: External Secant Segment | A secant segment that lies in the exterior of the circle with one endpoint on the circle. |
| If two secants intersect in the exterior of a circle, then the product of the lengths of one secant segment and its external segment is ______ the product of the lengths of the other secant segment and its external segment. | Equal to |
| If a secant and a tangent intersect in the exterior of a circle, then the product of the lengths of the secant segment and its external segment equals...? | The length of the tangent segment squared |
| Define: Tangent Segment | A segment of a tangent with one endpoint on the circle. |
| What is the equation of a circle? | (x-h)^2 + (y-k)^2 = r^2 |
Created by:
madzeroni