Question

if RADIUS = 7 cm find the diameter and circumference
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Answer 1

Answer:

Diameter of circles = 2r

= 2×7 = 14

circumference of circle= 2πr

= 2×22/7 × 7

= 44/7×7

= 308/7 = 44 cm

Answer 2

Answer:

The diameter is 14 cm and the circumference is 44 cm

Step-by-step explanation:

In context to the question asked,

We have to find the diameter and circumference,

It is given that, a circle with a radius $7$ cm

The formula for calculating the circumference will be $\pi d$.

Here d is the diameter of the circle.

Diameter is the line segment that passes through the center of a circle from one end to the other.

The diameter is twice the length of the radius.

So, $d = 2r$

=> d = $2\times 7$

=> d = 14 cm

So, the diameter of the circle is 14cm.

Now we will calculate the circumference of a circle with the given radius that is $7$ cm,

=> $\pi d$

=> $\frac{22}{7}\times ( 2\times 7)$

Multiplying 2 and 7, we get

=> $\frac{22}{7}\times ( 14)$

Expressing $\frac{22}{7}$ and 14 as a single fraction,

=> $\frac{22\times 14}{7}$

Multiply $22$ and $14$,

=> $\frac{308}{7}$

Divide $308$ by $7$,

=> 44 cm

Hence, the circumference of the circle is 44cm.