Question

Medal plus fan

Answer 1

what is your question?

Answer 2

I posted it

Answer 3

just now

Answer 4

fomrula for area of circle is pi*r^2

for area of square it is l*w

Answer 5

16th. Subtract area of the smaller circle from area of the bigger circle

Answer 6

17th. Find area of a circle and subtract it from area of square.

Answer 7

for 17th radius is half of the side of square

Answer 8

for 18th. find area of smaller circles and subtarct it from area of big circle

Answer 9

for 19th. formula for whole circle is pi*r^4

thus for quater you need to divide it by 4