Question

The radius of a circle is 1 kilometer. What is the circle's area?

Use 3.14 for ​.
square kilometers

Answer 1

No matter what size a circle is, it's always going to be 3.14. It's always going to be that because if you have a string that can wrap around the circle, it's going to always be turned out to be 3.14.

R = 1/2

Diameter = 1

Wrap the diameter around and you'll get 3.14.

Answer 2

3.14 km

Explanation:

we know that area of a circle is πr², where r is the radius

if here radius is 1 kilometres, π is 3.14

then, circle's area = 3.14 * 1 * 1 = 3.14 km