# Math Day 1&2

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1. Circle
set of coplainer points equidistant from a given point
2. center
the given point
a segment starting at the center and ending on the circle
4. Rule-
all radii in a circle are equal or congruent
5. chord
a segment starting and ending on the circle at different points
6. diameter
a chord that contains or goes through the center
7. secant
a coplainer line that contains a chord
8. Tangent
a coplainer line that intersects a cicle at only one point
9. Point of Tangency
the point where the tangent and the circle meet
10. Congruent Circles
two or more circles that have congruent or equal radii
11. Concentric circles
two or more coplainer circles with the same center
12. sphere
the set of points equidistant from a given point (3-D)
13. Common Tangent
a coplainer line that is tangent to two coplainer circles
14. Internal Common Tangent
a common tangent the intersects the segment joining the two centers
15. External Common Tangent
a common tangent that does not intersect the segment joining the two centers
16. Tangent circles
two coplainier circles that intersect at only one point
17. internally tangent circles
two coplainier circles that are tangent with one inside the other
18. externally tangent circles
two coplainier tangent circles that are not inside of each other
19. arc
a set of points that are part of a circle starting and ending at different points
20. minor arc
an arc that is less than half the circle (two letters)
21. major arc
an arc that is more than half the circle (three letters)
22. Semi-Circle
an arc that is equal to one half the circle (three letters if possiable)
if two arcs have a common end point only then the measure of the first arc plus the measure of the second arc equal the measure of the new arc form
24. congruent arcs
two arcs on the same circle (or congrunet circles) that have the same or equal measures
25. midpoint of an arc
the point on an arc that divides the arc into two equal or congruent parts
26. Inscribed polygon
a polygon drawn inside a circle with all vertics on the circle
27. Circumscribed circle
a circle drwn around a polygon touching all vertices
28. Inscribed circle
a circle drawn inside a polygon touching all sides
29. Circumscribed polygon
a polygon drawn around a circle with all sides touching the circle

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 Author: Anonymous ID: 146210 Filename: Math Day 1&2 Updated: 2012-04-07 15:31:39 Tags: Math Day Folders: Description: vocabulary words Show Answers:

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