Across
- 3. the number of radians in a full circle
- 6. distance around a circle
- 7. a circle measured using angles based on π instead of degrees uses this unit
Down
- 1. a many-sided shape used historically to approximate circles
- 2. distance across a circle through the center
- 4. distance from the center of a circle to its edge
- 5. the branch of math that studies shapes and space