The area of a trapezium is 306 cm^{2} and the distance between its parallel sides is 17 cm. If one of the parallel sides is of length 25 cm, find the length of the other side.

Given a circle, a circumscribed square is one that completely encloses the circle, and an inscribed square is completely enclosed by the circle, as shown below

If the the difference in the areas of the two squares is 63 sq. m., then what is the area of the circle in sq. m.? Assume π =

Draw a circle of with its two chords ^@AB^@ and ^@CD^@ such that ^@AB^@ is not parallel to ^@CD^@. Draw the perpendicular bisector of ^@AB^@ and ^@CD^@. At what point do they intersect each other.

A cone made completely of metal (i.e. it is not hollow) has a base radius of 8 cm, and height of 32 cm. If we melt it and recast it into a sphere, what will be the radius of sphere?