All Circle Formulas
The circle is defined as the set of points placed at equal distance from a single point in a plane. The midpoint of the circle is called the center of the circle. Parameters like area, circumference, the radius of a circle can be calculated using all circle formulas.
Let us understand all circle formulas using solved examples.
What Are All Circle Formulas?
Different Circle Formulas to calculate different parameters of a given circle can be expressed as,
The diameter of a Circle D = 2 × r
Circumference of a Circle C = 2 × π × r
Area of a Circle A = π × r2
r = radius of the circle
d = diameter of the circle
c = circumference of the circle
Solved Examples Using All Circle Formulas
Find the area of the circular park whose radius is equal to 200m.
To find: Area of a park.
The radius of the park = 200 m
Using Area of a Circle Formula,
Area of a Circle = π × r2
= π × 2002
= π × 40000
Answer: The area of the circular park is 40000π m2.
If the radius of a circle is 7 units. then find the circumference of a circle.
To find: circumference of a circle
The radius of circle = 7 units
Using the circumference formula,
Circumference of a Circle, C = 2 × π × r
= (2 × π × 7) units
C = 14π
Answer: The circumference of the circle is 14π units.