Circled Corners

Three circles have been drawn at the vertices of this triangle. What is the area of the inner shaded area?
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Problem



The diagram shows a triangle and three circles whose centres are at the vertices of the triangle. The area of the triangle is $80 cm^2$ and each of the circles has radius $2cm$. What is the area, in $cm^2$, of the shaded area?

 

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Circled Corners