Question

Jenny draw a circle of radius 10 cm and colour it green. she then cut a circle of radius 7 cm from inside that circle. what is the area of remaining green shape

Answer 1

pie*(10²-7²) is the area
=3.14*51=160.14

Answer 2

area of circle is $\pi$ $r^{2}$
$\pi$*10*10=
100$\pi$
$\pi$*7*7=
49$\pi$
100$\pi$-49$\pi$=
51$\pi$