Question

Find the area of the shaded regions. ANSWER IN PI FORM AND DO NOT I SAID DO NOT WRITE EXPLANATION

Answer 1

Answer: 18π

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Answer 2

Explanation:

Here angle is given in degree.We have convert it into radian.

`{1}^(\circ) =( { (\pi)/(180) } )^(c) \\ \therefore \: {80}^(\circ) = ( (80\pi)/(180) ) ^(c) = {( (4\pi)/(9) })^(c) \: = \theta ^(c)`

• radius r = 9 cm

Area of green shaded regions = A

`\sf \: A = (1)/(2) { {r}^(2) }{ { \theta}^( c) } \\ = (1)/(2) * {9}^(2) * (4\pi)/(9) \\ = 18\pi \: {cm}^(2)`