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Learn how to insert special characters such as radius symbol (Ø) using keyboard shortcuts or Word auto correct. See a list of common symbols and their codes for PC.
Learn the definitions and formulas of radius, diameter, and circumference of a circle, and how to use the number pi (π) to calculate them. See examples, interactive exercises, and challenge problems on circles.
Learn what is the radius of a circle, how to calculate it from diameter, circumference or area, and see examples and interactive diagrams. The radius symbol is r and it is the length of the line from the center to any point on the circle.
Learn what is the radius of a circle, how to calculate it from diameter, circumference, or area, and see examples and practice problems. The radius is denoted by "R" or "r" and is the distance from the center to the boundary of the circle.
Learn what is radius, how to find it using formulas, and how to draw a circle with radius. See examples of radius of a circle and a sphere with diagrams and equations.
Learn what is the radius of a circle, a polygon, a sphere and a cylinder, and how to calculate it. Find out how to use the radius as an angle unit in trigonometry.
Learn what is the radius of a circle, how to find it from area or circumference, and how to use it in theorems and equations. See solved problems on radius and chord of a circle.
