## Realated Questions

4 identical circular coins are placed inside the square ABCD as in the following diagram. If for each coin then the area not occupied by the coins in ABCD is

Three circles with centers P, Q and R, each with radius 20 cms, interest one another as shown in the figure. The length of AB=12 cms, CD=10 cms and EF=5cms. What is the perimeter of the triangle PQR?

Let C be a circle with centre P

_{0}and AB be a diameter of C. Suppose P_{1}is the mid point of the line segment P_{0}B, P_{2}is the mid point of the line segment P_{1}B and so on. Let C_{1}, C_{2}, C_{3}, ...... be circles with diameters P_{0}P_{1}, P_{1}P_{2}, P_{2}P_{3}... respectively. Suppose the circles C_{1,}C_{2}, C_{3}, .... are all shaded. The ratio of the area of the unshaded portion of C to that of the original circle C is?