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**3.**sum of three angles of a _________ is 180**5.**equilateral quadrilateral**7.**line segment joining the centre of the circle to any point on the circle itself**9.**three or more points that lie in a straight line**11.**relationship between two lines which meet at a right angle**14.**Algebric Expression which has two or more Terms**15.**Every point on the number line represents a unique real number**16.**All the rational numbers and irrational numbers taken together**17.**line that passes through two lines in the same plane**18.**________ is a Whole Number**20.**__________ is a Rational Number**21.**Quadrilateral with two pairs of parallel sides**22.**equiangular quadrilateral

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**1.**Indian Astronomer and Mathematician**2.**line segment whose endpoints lie on the circle**4.**Numbers between two rational numbers are __________**6.**Greek Genius - PI Decimal Expansion**8.**Two angles whose sum is 180 degrees**10.**Every Whole Number is a _________ Number**11.**Two lines on a plane that never meet**12.**Two distinct point in a plane determine a _____________ line**13.**regular quadrilateral**19.**closed figure that is the union of line segments in a plane**21.**Greek philosopher and mathematician