Question

Find the radius of the circle whose circumference is 22

units.​

Answer 1

Answer:

Radius of the circle is 7 units.

Step-by-step explanation:

Let's assume that, the radius is r units.

Then the diameter is 2r.

We know that, the ratio of circumference to diameter is constant and that is π.

Therefore, $\frac{Circumferenece}{Diameter} =$ π

=> π times Diameter = Circumference

∴ 2πr = 22

∴ πr = 11

∴ $\frac{22}{7} r = 22$

∴ r = 7

Answer 2

Radius = 3.5 units

Step-by-step explanation:

GIVEN

Circumference Of Circle = 22 units

___________________________

TO FIND

Radius

___________________________

We know that,

Circumference Of Circle = 2 × π × r

22 = 2 × 3.14 × r

22 = 6.28 × r

Radius = 22 / 6.28

Radius = 3.5

Radius = 3.5 units

___________________________

IMPORTANT

Circumference Of Circle = 2 × π × r

Area Of Circle = π × r²

Perimeter If Semicircle = π × r

Area Of Semicircle = ½ × π × r²