##### Across

**2.**7 sided polygon**5.**a straight line from the centre to the circumference of a circle or sphere**7.**6 sided polygon**10.**a quadrilateral with opposite sides parallel and equal.**12.**a quadrilateral with one pair of parallel opposite sides**15.**9 sided polygon**16.**______ angle is an angle more than 90 degree**17.**quadrilateral in which one of its diagonals is its axis of symmetry**18.**______angle is an angle exactly 180 degrees**19.**10 sided polygon**21.**a distinctive three-dimensional geometric figure with a flat and curved surface pointed towards the top.**23.**a three-dimensional shape, that has six rectangular faces, eight vertices and twelve edges.**24.**a regular quadrilateral, which has all the four sides of equal length and all four angles are also equal.**28.**the longest side of a right angled triangle**29.**8 sided polygon**30.**a round plane figure whose boundary consists of points equidistant from a fixed point.

##### Down

**1.**a round solid figure, or its surface, with every point on its surface equidistant from its centre.**3.**a plane figure with 3 sides**4.**a three-dimensional shape consisting of two parallel circular bases, joined by a curved surface**6.**5 sided polygon**8.**perimeter of circle**9.**_____ angle is 90 degrees**11.**twice the radius**13.**_____angle is an angle between 180 degree and 360 degrees**14.**the height of a triangle**20.**_____ angle is an angle less then 90 degree**22.**a parallelogram with opposite sides equal and each angle is 90 degree**25.**a parallelogram with all equal sides**26.**has a polygonal base and flat triangular faces, which join at a common point called the apex**27.**a solid three-dimensional figure, which has 6 square faces, 8 vertices and 12 edges.