Question

find the diameter and radius of the circle
circumference - 165 cm​

Answer 1

Circumference of a circle=2πr

165=2×22/7×r

165=44/7×r

165×7/44=r

r=1155/44

r=26.25

Diameter=2×Radius

=2×26.25

=52.5

Therefore,

The radius is 26.25cm and the diameter is 52.5cm

Answer 2

Answer:

Radius of circle is 26.52 cm.

Diameter of circle is 52.5 cm .

Step-by-step explanation:

Given :-

Circumference of circle is 165 cm.

To find :-

The radius of circle and diameter.

Solution :-

The circumference means the length of the complete arc of a circle.

As we know that,

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

Where ,

r is a radius of circle.

Put the given values in these formula we get

$165 = 2\pi \times r$

$\frac{165}{2\pi}  = r$

$\frac{82.5}{\pi}  = r$

The value of π is $\frac{22}{7}$ .

$\frac{82.5}{\frac{22}{7}}  = r$

$\frac{82,5 \times 7}{22} =r$

$\frac{577.5}{22} =r$

$r = 26.25$

So,

Radius of circle is 26.52 cm.

Diameter = radius × 2

Diameter = 26.25 × 2

Diameter = 52.5

Hence .

Diameter of circle is 52.5 cm .