Centres of two circles having radius 2 and 1 units are 5 units apart. The area of the quadrilateral formed by joining the points of contact of external tangents drawn to circles is equal to (in sq. units)
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A natural number is an integer greater than 0.
Natural numbers begin at 1 and increment to infinity: 1, 2, 3, 4, 5...
Natural numbers are also called "counting numbers".
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