Question

find a) area and b) circumference of a circle that has a diameter of 40 cm. use 3.14 for pi.

Answer 1

C≈125.66cm

Answer 2

circumference is 125.66

Answer 3

is that answer you were looking for?

Answer 4

thank you. Can you please explain how you got that(:

Answer 5

@imxbatman

Answer 6

\[c = \pi \times d\]

Answer 7

so
\[c = 3.14 \times 40\]

Answer 8

thank you sure @ChiefArnav

Answer 9

sir*

Answer 10

movin go its
\[c = 31.4 \times 4\]

Answer 11

therefore
\[c = 125.6 cm\]

Answer 12

for the area there are two formulae which do you want us to use @mayita_01?

Answer 13

as \[d \times d\]

Answer 14

d is 40 so 40 times 40 is 1600

Answer 15

so now it's
\[1/4 \times 3.14 \times 1600\]

Answer 16

so its
\[3.14 \times 400\]

Answer 17

as
\[1/4 \times 1600 = 400\]

Answer 18

so now its
\[314 \times 4\]

Answer 19

so its
314 times 1 = 314
314 times 2 = 628
314 times 3 = 942
314 times 4 = 1256
therefore the area is 1256cm