Question

find the radius and area of a circle with circumference 132mm. pls answer fast . anwer for 7th standard. ​

Answer 1

Answer:

Radius = 7 mm

Area = 154 mm²

Step-by-step explanation:

Let π be $\frac{22}{7}$,

Circumference = 132 mm

Circumference = 2πr

⇒ 132 = 2πr

⇒ $\frac{132}{2}$ = πr

⇒ 66 = $\frac{22}{7}$ × r

⇒ r = $\frac{66}{22}$ × 7

⇒ r = 3 × 7

Radius = 7 mm

Area of a Circle = πr²

Radius = 7 mm

⇒ $\frac{22}{7}$ × 7²

⇒ $\frac{22}{7}$ × 49

⇒ 22 × 7

⇒ 154 mm²

Area of the Circle = 154 mm²