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 ...
So you have a circle. What is the area of that circle? Surely everyone remembers that the area of a circle is: Where Pi (Ï€) is of course the number and r is the radius of the circle. Where does this ...
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