$\"\"$

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(a) Find $\"\"$ .

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Observe the graph:

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The region from $\"\"$ to $\"\"$ is in the shape of quarter circle.

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The quarter circle is below the $\"\"$ -axis.

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The area of quarter circle is $\"\"$ .

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$\"\"$ = area of quarter circle.

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Substitute $\"\"$ in $\"\"$ .

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$\"\"$

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$\"\"$ square units.

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$\"\"$ square units.

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$\"\"$

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(b) Find $\"\"$ .

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Observe the graph:

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The region from $\"\"$ to $\"\"$ is in the shape of triangle.

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The area of triangle is $\"\"$ .

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The base of triangle is $\"\"$ and height is $\"\"$ .

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$\"\"$ = area of triangle.

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$\"\"$

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$\"\"$ square units.

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$\"\"$ .

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$\"\"$

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(c) Find $\"\"$ .

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Observe the graph:

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The region from $\"\"$ to $\"\"$ is in the shape of triangle.

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The region is below the $\"\"$ -axis.

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Area of triangle is $\"\"$ .

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The base of triangle is $\"\"$ and the height is $\"\"$ .

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The region from $\"\"$ to $\"\"$ is in the shape of semi circle.

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The radius of semi circle is $\"\"$ .

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Area of semi circle is $\"\"$ .

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$\"\"$ area of triangle + area of semi circle. $\"\"$

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$\"\"$ square units.

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$\"\"$

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(d) Find $\"\"$ .

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$\"\"$

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Substitute $\"\"$ and $\"\"$ .

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$\"\"$

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$\"\"$ square units.

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$\"\"$

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(e) Find $\"\"$ .

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$\"\"$

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Substitute $\"\"$ and $\"\"$ .

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$\"\"$

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$\"\"$ square units.

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$\"\"$ square units.

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$\"\"$

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(f) Find $\"\"$ .

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$\"\"$

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Substitute $\"\"$ .

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$\"\"$ $\"\"$

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$\"\"$

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$\"\"$

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$\"\"$ square units.

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$\"\"$ square units.

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$\"\"$

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(a) $\"\"$ square units.

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(b) $\"\"$ square units.

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(c) $\"\"$ square units.

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(d) $\"\"$ square units.

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(e) $\"\"$ square units.

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(f) $\"\"$ square units.