If you’re only given the diameter of the circle, you can divide it by two to get the radius. For example, if the diameter of the circle is 10 centimeter (3. 9 in), then you can divide it by 2 (10/2) to get 5 centimeter (2. 0 in) as the radius. [2] X Research source
Area = (πr2)/2 Area = (π x 5 cm x 5 cm)/2 Area = (π x 25 cm2)/2 Area = (3. 14 x 25 cm2)/2 Area = 39. 25 cm2
Area = (πr2)/2 Area = (π x 5 cm x 5 cm)/2 Area = (π x 25 cm2)/2 Area = (3. 14 x 25 cm2)/2 Area = 39. 25 cm2
Area = (πr2)/2 Area = (π x 5 cm x 5 cm)/2 Area = (π x 25 cm2)/2 Area = (3. 14 x 25 cm2)/2 Area = 39. 25 cm2