Across
- 2. the total distance around its outer edge
- 4. the amount of three-dimensional space an object occupies
- 7. two-dimensional shape formed by joining three or more straight line segments to create a closed figure
- 8. an angle of 90° to a given line, plane, or surface
- 11. in the same place
- 12. a line, line segment, ray, or point that cuts a line segment exactly in half
Down
- 1. lying in the same straight line
- 3. middle point in a line segment
- 5. a ray that divides an angle into two equal parts
- 6. the space between two intersecting lines or surfaces
- 9. identical form
- 10. a point where two or more lines, edges, or rays meet