# Questions tagged [area]

Area is a quantity that expresses the extent of a two-dimensional measurement of a shape.

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### How to calculate area of a curved rectangle. [closed]

I need help with this task. It's a rectangle with two quarter-circles cut out. Nothing is known about the curves. a=30 b=20 r1=5 r2=10 Is it possible, to calculate ...
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### Area bounded by the curve y=xcosx and the x-axis

Find the area of the closed region bounded by the curve $y=xcosx$ and the x-axis (in other words the total area) for $((2n-1)pi))/2 \leq x \leq$(2n+1)pi))/2 where n is an arbitrary positive integer. ...
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### What function describes an area of projection of a circle that is tilting so that we start with the area of a circle and end up with a straight line?

My question is simple. I would like to know the function that describes the area of a projection of a circle on a plane (meaning something like an area of a shadow of the circle on a paper) based on ...