Gravity
The force that causes an object to travel in a circle is centripetal force. This force is directed towards the center of the circle and is necessary to keep the object moving along its circular path. It is responsible for changing the object's direction without changing its speed.
When a circle is folded along its diameter, it creates two congruent halves or semicircles.
It is the path along a circle that cuts the earth into two equal hemispheres.
If you had a circle and cut along the diametre you would get two half cirlces.
Plants feed animals, animals fertilize plants.
Chemical plants.
You use the information you're given, along with the facts and formulas you know about the geometry of a circle.
A circle.
A projectile following a parabolic path on a circle can be understood as the motion of an object launched at an angle along the circumference of the circle. As the object moves, gravity causes it to follow a parabolic trajectory while the curvature of the circle influences its path. The resulting motion combines the circular motion of the circle with the parabolic motion of the projectile.
December 21
Alaska
-- 12 inches across the circle, along any route that passes through the center -- 6 inches along any radius -- 12 pi = 37.7 inches (rounded) around the circle's curvy line