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KONKURS 2016/2017
Crossword
Po naciśnięciu kratki opisanej cyfrą pojawi się objaśnienie hasła.
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Across: 1. Half a circle. 3. A ray that divides an angle into two congruent angles 5. A quadrilateral with two pairs of parallel sides. 6. An angle which is between 0 and 90 8. A quadrilateral that has four right angles. 10. The set of all points on a plane equidistant from a given point (the centre). 11. For example: x > 0, x - 1 < 2. 13. The result of multiplication. 15. Right, acute or obtuse 18. A quadrilateral with at least two parallel sides 19. A three-sided polygon. 20. The result of addition 21. A plane closed figure consisting of line segments connected endpoint to endpoint, such as triangle, square or octagon. 22. An angle that is greater than 90 degrees and less than 180 degrees. 23. A polyhedron with a polygonal base and whose lateral faces are triangles having a common vertex.
Down: 1. Taking away. 2. A number which has no factors except itself and 1. 4. A rectangle with four sides equal. 7. A segment joining the base of a triangle and the vertex opposite the base. It is perpendicular to the base. 8. A line segment between the centre and a point on the circle. 9. A triangle with all sides of different lengths and three different angles 12. A triangle having two equal sides 14. The number od diagonals in a triangle 16. The longest chord of a circle. 17. A plane figure with 8 sides 20. A three-dimensional figure.
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