Question

A circle radius of 9cm sits inside a circle with a radius of 11cm

What is the area of the shaded region?
Round your final answer to the nearest hundredth.

Answer 1

Step-by-step explanation:

Required area = Large area - Small area

= pie R^2 - pie r^2

= pie ( R^2 - r^2 )

= pie ( 11^2 - 9^2)

= π ( 121 - 81 )

= π [ 40 ]

= 3.14 × 40

= 125.6 m^2

Answer 2

Answer:

125.6 cm²

Step-by-step explanation:

Find area of both the circles

Area of Circle (outer) - πr²

=3.14×(11)²=379.94

Area of circle (inner) - πr²

=3.14×(9)²=254.34

Now Subtract Area of Outer i.e Bigger circle with Inner i.e smaller one

=379.94 – 254.34 = 125.6cm²