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Sample Programs to Begin With

1) area of the circle given the diameter.
2)area of the circle given the circumference.
3)area of the circle given center point (x1,y1) and one point on the perimeter (x2,y2).
(Hint: input the two points and compute the distance between them as radius)
4)area of a triangle given three sides a,b,c.
5)area  and perimeter of a right angled triangle given width(w) and height(h).
6)volume and surface area of a sphere given the radius.
7)area of an equilateral triangle given one side (s).
8) volume and surface area of the cylinder given radius(r) and height(h).
9) volume and surface area of a cube given one side ( s).
10)hypotenuse of a right-angled triangle, given the length of the other two sides.

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