Across
- 1. divide (a line, angle, shape, etc.) into two equal parts.
- 6. a circle which passes through all the vertices of the polygon
- 10. the set of points which are an equal distance to a fixed point
- 11. a line segment that joins the center of a circle with any point on its circumference
- 13. a plane figure with five straight sides and five angles.
- 16. a triangle that has two sides of equal length
- 18. a rectangle in which two adjacent sides have equal length
- 20. the shape of traffic stop signs(in US)
- 21. any straight line segment that passes through the center of the circle and whose endpoints lie on the circle
- 23. the point where the internal angle bisectors of the triangle cross
- 26. a line that is tangent to a circle exists on the same plane as the circle and intersects the circle at exactly one point
- 30. twelve-sided polygon
- 31. an angle has its vertex where two rays share an endpoint outside a circle
Down
- 2. a line that intersects a curve
- 3. a polygon with four edges (or sides) and four vertices or corners
- 4. A shape that has all sides of equal length and each internal angle will always be equal to 144°
- 5. the portion of a circle bounded by two radii and the included arc
- 7. a triangle that it has its vertices on a circle
- 8. a triangle in which all three sides are equal
- 9. the distance around circle
- 12. a straight line segment whose endpoints both lie on the circle
- 14. a line segment from the center to the midpoint of the chord
- 15. two lines which meet at a right angle
- 17. the angle inside two adjacent sides of a polygon
- 19. a polygon that is equiangular (all angles are equal in measure) and equilateral (all sides have the same length)
- 22. a straight line that "just touches" the circle
- 24. a six-sided polygon
- 25. a seven-sided polygon
- 27. the point the point where the medians of a triangle intersect
- 28. nine-sided polygon
- 29. a polygon with three edges and three vertices