Question

If the diameter of a circle is 4 cm, find its circumference.​

Answer 1

Answer:

circumference- 2πr

2*3.14*2= 12.56 cm

Answer 2

Answer:

∴ The circumference of a circle is $12.56$ cm.  

Step-by-step explanation:

In context with question asked,

• We have to find the circumference of a circle.
• It is given that, the diameter of a circle = $4$ cm
• Diameter is twice the radius.
• So, Radius = $\frac{4}{2}$ = $2$ cm
• Circle is a set of points which are arranged at an equal distance from the center of a circle.
• Circumference is the boundary of a circle.
• The formula for circumference of a circle is given by,

    Circumference of a circle = $2\pi r$

                                        = $2\times 3.14 \times 2$

                                        = $12.56$ cm

• ∴ The circumference of a circle is $12.56$ cm.