Question

Formulaes of circles and system of circles

Answer 1

here some formula of circles

Answer 2

Answer:

The Circle Formulas are expressed as,

Diameter of a Circle D = 2 × r

Circumference of a Circle C = 2 × π × r

Area of a Circle A = π ×

${r}^{2}$

Where,

r denotes the radius of the circle.

d indicates the diameter of the circle.

c indicates circumference of the circle.

SOME EXAMPLES

Example 1

A circle has a radius 8 cm. Calculate its diameter, area and circumference.

Solution

Given parameters are,

Radius, r = 8cm

Diameter of a circle is given by

2r

= 2 × 8 cm

= 16 cm

Area of a circle is given by

π r2

= π × 64

= 201.088 cm2

Circumference of a circle is given by

2 π r

= 2 × π × 8

= 50.272 cm