Question

Find the area of a circle with a diameter of 20 inches. Use 3.14 for pi.


a. 62.8 in2
b. 125.6 in2
c. 188.4 in2
d. 314 in2

Answer 1

hint:

A = pi*r^2

A = area
r = radius

Answer 2

what is the "^" sign?

Answer 3

^ means power or exponent

so for example

" x^2 " means " x squared"

Answer 4

your calculator should have that button

Answer 5

whats the radius in this?

Answer 6

you cut the diameter in half (ie divide by 2) to get the radius


diameter = 20

radius = 10

Answer 7

so r = 10

Answer 8

i got 314

Answer 9

correct