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Math Help - Area of triangles with a part of a circle removed

  1. #1
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    Area of triangles with a part of a circle removed



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  2. #2
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    Quote Originally Posted by Laughing View Post


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    You can start by computing the area of region which is shaded in the attached picture. This region is a difference between an arc and a triangle.

    However, I don't see what exactly I should consider given in your picture. Some numbers simply don't work together. (If the large circle has radius 12cm and the small has radius 5cm, I do not think it is possible to have 7 cm where you wrote it between the circles. Also if 3 cm is where you wrote, this would mean 5^2+8^2=12^2. I think I'm getting something wrong - could you clarify the question?)
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  3. #3
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    Hmmm...is smaller circle radius 5, and larger circle radius 12?
    If so, then your line = 7 inside circle is impossible.
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