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Anyone help pls the topic I’m doing is circles

Anyone help pls the topic I’m doing is circles-example-1
User Plutor
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Answer

Area = 80.11 cm^2 and perimeter = 39.99 cm

Explanation:

The area of each small sector

= (60/360) * π * r^2

= (60/360) * π * 6^2

= 1/6 * 36 * π

= 6π

So the area of the 2 small sectors = 12π cm^2

Area of the large sector

= 1/6 * π * 9^2

= 13.5 π

Total area = 25.5π cm^2.

= 80.11 cm^2

Perimeter = 6 + 6 + 3 + 3 + 2 small arcs + 1 large arc

= 18 + 2 * 1/6 * 2πr + 1/6 * 2πr

= 18 + 2/3π*6 + 1/3π*9

= 18 + 7π

= 39.99 cm.

User Soronthar
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