Across
- 1. A 3-sided polygon (a flat shape with straight sides).
- 4. A symbol for a number we don't know yet. It is usually a letter like x or y.
- 7. The area of mathematics that deals with points, lines, shapes and space.
- 8. The longest side of a right triangle. The side opposite the right angle.
- 11. A triangle that has a right angle (90°).
- 12. The surface a solid object stands on, or the bottom line of a shape such as a triangle or rectangle.
- 13. Forget everything you know about numbers.
- 15. An obtuse angle is one which is more than 90° but less than 180°.
- 16. A pair of numbers used to locate a point on a coordinate plane is called an ordered pair.An ordered pair is written in the form (x, y) where x is the x-coordinate and y is the y-coordinate.
- 19. An expression that can have constants, variables and exponents, but no division by a variable.
- 20. The line on a graph that runs horizontally (left-right) through zero.
Down
- 2. f -1(x) is said to be the inverse of f(x) if f(f -1(x)) = f -1(f(x)) = x. It is obtained by interchanging the variables x and y of the function.
- 3. An equation where the highest exponent of the variable (usually "x") is a square (2).It is usually written ax2+bx+c = 0.
- 5. study of the relationships between the angles and the sides of a right triangle.
- 6. Two integers are opposites if they are each the same distance away from zero, but on opposite sides of the number line.
- 9. The line on a graph that runs vertically (up-down) through zero.
- 10. remain the same distance apart over their entire length. No matter how far you extend them, they will never meet.
- 14. The starting point.On a number line it is 0.
- 17. An exact location. It has no size, only position.
- 18. set of whole numbers and their opposites.