Across
- 5. a quadrilateral with both pairs of opposite sides parallel
- 6. a solid, or three-dimensional figure whose surface is made up of polygons
- 9. point where three angle bisectors from three vertices of the triangle meet
- 12. quotient of two quantities
- 14. set of all points equidistant from a given point
- 17. has one endpoint at the center and the other endpoint on the circle
- 18. number of square units it encloses
- 19. a parallelogram with four congruent sides and four congruent angles
- 20. distance around a circle
Down
- 1. formed by three noncollinear points connected by segments
- 2. middle point of a line segment
- 3. set of all points in space equidistant from a given point called the center
- 4. a segment that contains the center of a circle
- 5. extends in two dimensions without end
- 7. point where all three altitudes of the triangle intersect
- 8. line that divides something into two equal parts
- 10. intersects two or more coplanar lines at different points.
- 11. educated guess
- 13. when three or more lines intersect at one point
- 15. set of all points in three dimensions
- 16. the distance around the figure