Introdcution about Circles

ABCDA is a con-cyclic quadrilateral of a circle ABCD with radius r and centre at O. If AB is the diameter and CD is parallel and half of AB and if the circle completes one rotation about the centre O, then the locus of the middle point of CD is a circle of radius

Basic OF circle || General form OF circle || Circumference || Questions based on Circle

A right angled trapezium is circumscribed about a circle. Find the radius of the circle. If the lengtyhs of the bases (i.e.parallel sides ) are equal to a and b.

In the given figure, four equal circles are described about corners of a square so that each circle touches two of the circles as shown in the figure. Find the area of the shaded region, each side of the square measuring 14 cm.

triangleABC is an isosceles triangle in which AB=AC, circumscribed about a circle. Prove that the base is bisccted by the point of contact.

A square is circumscribed about a circle which is turn circumscribes another square. The ratio of the area of outer square to the inner square

A square is circumscribed about a circle which is turn circumscribes another square. The ratio of the area of outer square to the inner square