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Across 1. A number from 0 to 1 that indicates how likely an event is to occur. 4. The set of all points in a plane that are the same distance, r, from a given point in the plane. 7. The distance d+2r of the circle. 8. Each altitude of a triangle from the center of the polygon to a side of the ploygon. 9. The measure fo each angle of an equilateral triangle is 60 degrees. 11. The distance of r of the circle. 12. The distance around a circle. 13. If they have no points in commmon (except for boundary points). 14. The angles whose vertices are the endpoints of the base. 16. The angle opposite the base.

Down 1. The permeter of a closed plane figure is the distance around the figure. 2. A triangle with at least two congruent sides. 3. The same distance from a given point on a plane. 5. The area of an enclosed region on a plane can be approximated by the sum of the areas of a number of rectangles. 6. The area of a closed plane figure is the number of non-overlapping squares of a given size that will exactly cover the interior of the figure. 10. Divide the circle into eight c ongruent pie-shaped parts. 15. The two congruent sides.