Question

The radius of a circle is 7 cm; find its circumference and area.
​

Answer 1

Step-by-step explanation:

Circumference of a circle=2πr

=2.22/7.7

=44cm

Area of a circle=πr^

=22/7×7.7

=154cm

Answer 2

Given :

• Radius of Circle = 7cm

To Find :

• Circumference of Circle
• Area of Circle

Solution :

⟹ Circumference of Circle = 2πr

⟹ Circumference of Circle = 2 × 22/7 × 7

⟹ Circumference of Circle = 2 × 22

⟹ Circumference of Circle = 44cm

Thus Circumference of Circle is 44cm

________________

⟹ Area of Circle = πr²

⟹ Area of Circle = 22/7 × (7)²

⟹ Area of Circle = 22/7 × 7 × 7

⟹ Area of Circle = 22 × 7

⟹ Area of Circle = 154cm²

Thus Area of Circle is 154cm²

________________

★ Additional Info :

Formulas Related to Circle:

• Circumference of Circle = 2πr
• Area of Circle = πr²
• Diameter of Circle = 2 × Radius
• Radius of Circle = Diameter/2

________________