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Mathematics 8 Online
OpenStudy (anonymous):

Find the area of the shaded portion. image is under

OpenStudy (anonymous):

OpenStudy (saifoo.khan):

Break the figure into two triangles.

OpenStudy (anonymous):

And find the area of the circle, take a % of the chunk of the circle that is included in the triangles and find the difference

OpenStudy (anonymous):

how do i find the area ?

OpenStudy (saifoo.khan):

Area of triangle = 1/2 * b * h

OpenStudy (saifoo.khan):

area of unshaded sector = theta/360 * pi *r^2

OpenStudy (anonymous):

is the answer 108 pi

OpenStudy (goformit100):

omg................i did it correctly , but didnt posted. I WAS CONFUSED

OpenStudy (anonymous):

The area of the sector of the circle that's part of the triangles is theta/360 * pi *r^2 as saifoo mentioned. theta = 120 120/360 * pi * r^2 = 12pi

OpenStudy (anonymous):

Now you need to find the area of the triangles and subtract the difference.

OpenStudy (anonymous):

Use your right angle trig laws.

OpenStudy (anonymous):

so the area of the triangle is 6?

OpenStudy (anonymous):

im really horrible at math

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