Surely everyone remembers that the area of a circle is: Where Pi (π) is of course the number and r is the radius of the circle. Where does this formula come from? One method of obtaining this ...

A segment is the section between a chord and an arc ... find the area of the triangle within the sector subtract the area of the triangle from the area of the sector In this formula, \(\text ...

The circumference of a circle is the distance around the shape. The circumference is the perimeter of the circle. An arc is a part of ... of the radius into the formula. Multiply 2 by π then ...