Circles
A circle is a closed shape that is round and has no corners.
A circle has a fixed point in the center called the “center” of the circle.
The distance from the center of the circle to any point on the circle is called the “radius” of the circle.
The distance across the circle passing through the center is called the “diameter” of the circle.
The circumference of a circle is the distance around the circle.
The formula to calculate the circumference of a circle is C = 2πr, where “C” represents the circumference, “π” is a constant approximately equal to 3.14, and “r” represents the radius.
The formula to calculate the area of a circle is A = πr², where “A” represents the area and “r” represents the radius.
Test Your Understanding
Circle 1
