~ Click the black box to set the diameter and radius. a. You need diameter to find the circumference. b. You need radius to find area. ~ Click space to calculate.
(words in brakets are the colors of the item in the picture) Circular Words: Diameter = radius x 2 (in other words, radius is half of the diameter) Diameter is the line from any edge to any edge in a circle. [black & green] Circumference = diameter x pi (3.14...) Circumference is the perimeter. [red] Center is the center of the circle. [teal] Radius is any edge to the center. [green OR black]
