Across
- 2. the study of the relationships between the sides and angles of triangles
- 4. 3 positive whole numbers that make a right triangle
- 6. a region between 2 radii and an arc of a circle
- 9. the region between 2 concentric circles
- 13. the same distance from 2 endpoints of a segment
- 18. a quadrilateral inscribed in a circle. the sides are chords and the angles are inscribed in the circle
- 20. an angle constructed by extending one side of a triangle
- 21. when a figure coincides under its reflection
- 22. a line intersecting 2 or more lines on the same plane
- 24. a solid formed by polygons that enclose a single region of space
- 26. a line segment with 1 endpoint outside of a circle and 1 endpoint that meets the circle; perpendicular to the radius
- 27. parallel lines on different planes
- 28. the longest side of a triangle; it's always across from the right angle
Down
- 1. a quadrilateral with exactly 1 pair of parallel sides
- 3. a bisector that is perpendicular to the segment and creates a line of symmetry
- 5. some fraction of the circumference of its circle; # of degrees out of 360 times circumference
- 6. 2 angles that have a sum of 180 degrees
- 7. a circle inside a polygon that touches each polygon side
- 8. a minor arc formed by the measure of the central angle
- 10. the region between a chord and an arc of a circle
- 11. the faces of a prism that aren't bases
- 12. half of a sphere
- 14. an angle with its vertex on the circle and the sides are chords of the circle
- 15. a triangle with 3 different side lengths
- 16. a polyhedron with 2 faces (bases) that are congruent, parallel polygons
- 17. points on the same line
- 19. the point where all of the lines intersect
- 23. an altitude from the center of a polygon to the side of the polygon
- 25. the point of concurrency for the 3 angle bisectors of a triangle