INTRODUCTION AREA RELATED TO CIRCLE

The circumference of Circle A is twice the circumference of circle B. {:("Quantity A","Quantity B"),("The area of Circle A","Twice the area of Circle B"):}

The area of a circle is A 1 and the area of a regular pentagon inscribed in the circle is A 2 ​ . Then A 1:A 2 ​ is

The figure above shows two circles , each with center O. Line segment bar(AB) is tangent to the smaller circle . If OA=5 and AB=12, what is the ratio of the area of the smaller circle to the area of the larger circle ?

The figure shows two circles with the same center O. Line segment bar(AB) ios tangent to the smaller circle . If OA=5 and AB=12.what is the ratio of the area of the smaller circle to the area of the larger circle ?

The circle above with centre A has an area of 21. BC is tangent to the circle with centre A at point B. IF AC=2AB, then what is the area of the shaded region?

A rectangle ABCD is inscribed in a circle. Let PQ be the diameter of the circle parallel the side AB. If /_BPC = 30^@ , then the ratio of the area of rectangle to the area of circle is

The cicrcumference of a circle is give by the formula C = pid where d is the diameter of the circle. The formula for the area of a circle is A = pir^2 . If the area of the circle is 9pi , what is the circumference of the circle ?

If the sum of the areas of two circles with radii R_(1) and R_(2) is equal to the area of a circle of radius R, then

In the figure above, O is the center of the circle. If the area of triangleXOY is 25, what is the area of circle?

The figure shows a rectangle ABCD with a semi-circle and a circle inscribed inside it as shown. What is the ratio of the area of the circle to that of the semi-circle ?