Find the area of a circle with a diameter of 4

A = 4pi or approximately 12.56

Step-by-step explanation:

The area of a circle is given by

A = pi r^2

We need to find the diameter

r =d/2

r =4/2 =2

A = pi (2)^2

A = pi (4)

A =4pi

We can approximate pi by 3.14

A = 3.14*4 =12.56

12.56

Step-by-step explanation:

The formula for finding the area of a circle is π×r²

to get the radius you half the diameter.

half of 4 is 2 then you square the radius which gets you to 4 again

then multiply 4 by 3.14 or PI

after you do that you should get the answer 12.56

cut 138 centimeters off

step-by-step explanation:

250-112 = 138