2 The area of the circle with radius 20 is. This goes back to manipulating the formula for finding the area of a circle A pr 2 to get the diameter. Input the radius of the circle.
It is what you draw.
Just plug that value into the formula for the area of a circle and solve. Area of a triangle Herons formula Area of a triangle given base and angles. If the circumference of the circle is 10 cm then the diameter is 10 cmp or 318 cm. Area of a triangle given sides and angle.