Across
- 5. If two sides in a triangle are congruent, then the opposite angles to these sides are congruent
- 6. the amount of space that a substance or object occupies
- 9. A line, line segment, ray, or point that cuts a line segment exactly in half
- 11. a line that splits an angle into two equal angles
- 12. a proposition that is consistent with known data, but has been neither verified nor shown to be false
- 14. in the same plane
- 15. lying in the same straight line
Down
- 1. Identical in form
- 2. the continuous line forming the boundary of a closed geometric figure
- 3. Space between two intersecting lines or surfaces at or close to the point where they meet
- 4. each angular point of a polygon, polyhedron, or other figure
- 7. an angle of 90° to a given line, plane, or surface
- 8. a plane figure with at least three straight sides and angles, and typically five or more
- 10. a mathematical statement which appears to be true, but has not been formally proven
- 13. A point in the center joining two points