If the diameter of a circle is d, then its perimeter is

If diameter of semi-circle is 7 cm then perimeter of semi circle is ................... .

The diameter of a circle is equal to the perimeter of a square whose area is 3136 cm2. What is the circumference of the circle? (a) 352 cm (b) 704 cm (c) 39424 cm (d) 1024 cm

The diameter of a circle is 7 cm. its circumference is

If the perimeter of circle A is equal to perimeter of semi circle B, what is the ratio of their areas ?

A square has two of its vertices on a circle and the other two on the tangent to the circle. If the diameter of the circle is 10. determine the side of the square.

The diameter of a circle is 14cm, find its radius.

In the figure given below, D is the diameter of each circle. What is the diameter of the shaded circle ?

If the perimeter of a triangle and the diameter of an ex-circle are equal , then the triangle is

If the perimeter of a sector of a circle is twice the diameter of the circle, then the radian measure of the angle of the sector is

If the diameter of a protactor is 21 cm, then find its perimeter.