Excel displays percentages of a whole using pie charts, also known as wedge charts of circle graphs. Businesses tend to rely on such charts. The diagrams appear cluttered when graphing many items, and ...

Any point P with coordinates (\(x,~y\)) on the circumference of a circle can be joined to the centre (0, 0) by a straight line that forms the hypotenuse of a right-angle triangle with sides of length ...

Find the equation of a circle with radius 3 units and centre (0, 0). The radius, \(r = 3\) and \(r^2 = 9\), so the equation of the circle is \(x^2 + y^2 = 9\). What is the radius of the circle given ...