Question

Find the circumference and area of each of the following circles whose diameter is : 3.5 cm​

Answer 1

Step-by-step explanation:

diameter = 3.5 cm

radius = 3.5 / 2 = 1.75 cm

circumference of circle =

$\: \: \: \: \: \: \: \: 2\pi r \: \\ = 2 \times \frac{22}{7} \times 1.75 \\ = \frac{44}{7} \times 1.75 \\ = 44 \times 0.25 \\ = 11$

$area \: of \: the \: circle \: = \pi {r}^{2} \\ = \frac{22}{7} \times 1.75 \times 1.75 \\ = 22 \times 0.25 \times 1.75 \\ = 9.625$

here is your answer .......

Answer 2

Answer:

Circumference=11cm ; Area = 9.625cm²

Step-by-step explanation:

Diameter of a circle is twice the radius .

So, radius = d÷2= 3.5cm÷2 = 1.75cm

Circumference = 2πr

=2×22/7×1.75

=11cm

Area = πr²

=22/7×(1.75)²

=22/7× 3.0625

=9.625cm²