Question

The circumference of a circle is 28.26cm find the diameter and area

Answer 1

Answer:

Diameter of circle is 9 units.

Step-by-step explanation:

Given, the circumference of circle which is 28.26 units.

we have to find the diameter of circle.

2\pi r=28.262πr=28.26

r=\frac{28.26}{2\pi }=\frac{28.26}{2\times 22}\times 7r=

2π

28.26

=

2×22

28.26

×7

=14.13\times\frac{7}{22}=4.95\sim 4.5units=14.13×

22

7

=4.95∼4.5units

Diameter=2\times radius=2rDiameter=2×radius=2r

=2\times 4.5=9 units=2×4.5=9units

Diameter is 9 units.

Answer 2

Step-by-step explanation:

the circumference of a circle =2πr=28.26

2(3.14)r = 28.16

6.28r = 28.1

r=4.5cm

d=2r

d=2(4.5)=9cm

area of the circle =πr²

3.14(4.5)² = 3.14(20.25) = 63.5cm²