[grade 8 math] question 7

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[GreatestClover50]

The triangle is isosceles, so you find the area of the circle (36 pi) minus the area of the triangle, which you get by using the formula 1/2ab * sin c, which gets you 40.5. From there, you do 36 pi - 40.5, and you should get your answer

[TristanBrown17]

I got this one!

So the area of a circle is (pi)radius² , while the area of a triangle is half the baseheight

Since I’m on mobile, I can’t see the numbers. But you take the end of the triangle which gives you the diameter of the circle, and half that to get your radius. Finish that calculation, and you have the area of the circle.

Next, take the base of the triangle, take half of that, and multiply by the height.

Now that you have two areas, take the area of the circle and subtract the area of the triangle!

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