Question

Give the circumference and the area of a circle with diameter 4yd use the value of 3.14 for pi

Answer 1

Area=12.56yd^2, Circumfrence=12.56yd

Explanation:

the formula for the area of a circle is pi*r^2 and since pi is 3.14 and r is 2 so r^2 is 4 and 4*3.14 is 12.56 (r is the radius)

the formula for the circumference of a circle os 2*pi*r and r is 2 so its 2*3.14*2 multiplying all these terms again gives us 12.56 but be careful with the units as with the area comes yd^2 and with the circumference comes yd only

Answer 2

Circumference = 12.56 yd

Area = 12.56 yd²

Explanation:

Equations we need to know:

Circumference of circle - 2πr

Area of circle - πr²

1) Circumference

2 x 3.14 x 2 = 12.56

2) Area

3.14 x 2² = 12.56

We have to make sure the we are using the radius and not the diameter otherwise our answer would be wrong

Hope this helps, have a lovely day! :)