# MATHEMATICS

##### Across
1. 2. the longest chord of the circle;
2. 3. A set of argument values for which the function is defined;
3. 5. Any point at which the value of a function is largest or smallest;
4. 6. The point where the axes of the coordinate system intersect;
5. 9. A quadrilateral with two pairs of parallel sides;
6. 10. b2 − 4ac;
7. 12. Member x of the domain for which f(x)=0;
8. 13. A line segment joining a vertex to the midpoint of the opposing side;
9. 15. Two angles that sum to a straight angle are called ……… angles;
10. 17. The …. Is the angle subtended by an arc that has the same length as the circle’s radius (unit of angular measurement in the SI system);
11. 18. A function that repeats its values in regular intervals;
12. 20. The horizontal coordinate in a Cartesian coordinate system;
##### Down
1. 1. ……. angles – angles between 0-90 degrees;
2. 2. The expression written below the line in a common fraction that indicates the number of parts into which one whole is divided;
3. 4. A line is said to be …. To another line if the two lines intersect at a right angle;
4. 7. In geometry, the longest side of a right-angled triangle;
5. 8. Trigonometric ………. – equalities that involve trigonometric functions and are true for every single value of the occurring variables;
6. 11. A triangle with two sides of the same length;
7. 14. ……… form of a function – a form from which we can tell the coordinates of the vertex of parabola;
8. 16. Other name for absolute value;
9. 19. A function that is symmetric with respect to the y-axis;