A quadrant.
name of ballet move half circles made by pointed foot creating letter d on floor
Protractors have to be half- circles because they measure angles less than 360 degrees.
1. Take an A4 piece of paper and fold it in half. 2. Write you name on it somewhere. 3. Fold it in half again. 4. Fold it again in half. 5. Then turn the paper around and fold it in half. 6. Fold it again in half. 7. Write a name of something that makes you happy on it 8. Fold it in half again. 9. Fold it again in half. 10. Then turn the paper around and fold it in half. 11. Fold it again in half. 12. Write today’s date on it. 13. Fold it again in half. 14. Unfold all of the folds. 15. Screw it up into a ball. 16. Throw it in the bin.
8
A venn diagram.
900 degrees
Weather maps use half circles or triangles to show the direction and strength of wind. The direction in which the half circles or triangles point indicates the wind direction, while the number of half circles or triangles can indicate wind speed or intensity.
Half a torus (a donut/doughnut)
Orbit (chewing gum)
Two
2
To draw circles you need to use a compass