Perimeter and A...

Perimeter of a triangle is the sum of the lengths of all the ............ sides.

What is the area of the given figure? $$ABCD$$ is a rectangle and $$BDE$$ is an isosceles right triangle.

If the radii of two concentric circles are $$15\ \text{cm}$$ and $$13\ \text{cm}$$, respectively, then the area of the circulating ring in sq. cm will be:

The diameter of each circle shown in the given figure is 'd'  then the area of the square is given by

The area of a circle is 301.84 $$\displaystyle cm^{2} $$ Then its radius is

A circular park has a path of uniform width around it. The difference between the outer and inner circumferences of the circular park is $$132$$ m. Its width is

The radius of a circle whose area is equal to the sum of the areas of two circles of radii 5 cm and 12 cm is

The radius of a circle is increased by 1 cm. Then the ratio of new circumference to the new diameter is

From a square metal sheet of side $$28\;cm$$, a circular sheet is cut off. Find the radius of the largest possible circular sheet that can be cut. Also find the area of the remaining sheet.

If the perimeter and area of a circle are numerically equal then the radius of the circle is