Question

find the circumference of circle whose diameter is 4 cm​

Answer 1

Answer:

circumference of circle=88/7cm

Step-by-step explanation:

d=4cm

r=4/2=2cm

circumference of circle=2πr

=2×22/7×2

=88/7cm

Answer 2

$\bigstar$ Question:

$\longrightarrow$ Find the circumference of circle whose diameter is 4 cm.

$\bigstar$ To Find:

$\longrightarrow$ Circumference of circle = ?

$\bigstar$ Given:

$\longrightarrow$ Diameter = 4 cm

$\bigstar$ Required Formula's:

$\longrightarrow$ Circumference of circle = 2 $\pi$ r

$\longrightarrow$ Radius = $\tt{\frac{diameter}{2}}$

$\bigstar$ Solution:

Let us find the radius,

To find the radius the formula is $\tt{\frac{diameter}{2}}$

Radius = $\tt{\frac{4}{2}}$

Radius = 2 cm

Circumference of circle = 2 $\pi$ r

= 2 × $\frac{22}{7}$ × 2

= 4 × $\frac{22}{7}$

= $\frac{22×4}{7}$

= $\frac{88}{7}$

= 12.57 cm$^2$

Thus,The circumference of circle is 12.57 cm$^2$.

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