A line through is a diameter. A line from the center to the edge is a radius, which is half of the longest diameter. A circle is the same as 360 degrees. A part of a circle is called an arc.
Diameter x 3.14 = circumference.
(https://www.mathplanet.com/education/pre-algebra/introducing-geometry/circle-graphs)
A circle graph or pie chart is used to visualize information and data.
(https://www.mathplanet.com/education/pre-algebra/introducing-geometry/circle-graphs)
A circle with radius 5 is about 75.5 in squared.
(https://www.mathplanet.com/education/pre-algebra/area-and-volume/measure-areas)
A full rotation or measure of the angles in a circle is 360 degrees or 2π radians. The circumference of a circle is 2π * radii.
(https://www.khanacademy.org/math/algebra2/x2ec2f6f830c9fb89:trig/x2ec2f6f830c9fb89:radians/v/introduction-to-radians)
Topics
- Unit Circle