Mathematics, 29.11.2020 19:10, xdpugx0

We consider the circles (C) (O; 9) and (C ’) (O’; 4) tangent on the outside. To calculate the area of the surface between the two circles and a tangent
common to both circles: show that this surface is obtained by the difference between
that of a rectangular trapezoid and those of two disk sectors.
So calculate the area.

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We consider the circles (C) (O; 9) and (C ’) (O’; 4) tangent on the outside. To calculate the are...