Across
- 3. A circle is the length of the line through the center and touching two points on its edge.
- 4. A 2-dimensional shape made by drawing a curve that is always the same distance from a center.
- 5. An expression that can have constants, variables and exponents, but no division by a variable.
- 6. A triangle that has a right angle (90°)
- 8. A symbol for a number we don't know yet. It is usually a letter like x or y.
- 9. A 3-sided polygon (a flat shape with straight sides).
- 10. An obtuse angle is one which is more than 90° but less than 180°.
- 11. Root The square root of a number is a value that, when multiplied by itself, gives the number.
- 13. An equation where the highest exponent of the variable (usually "x") is a square (2).It is usually written ax2+bx+c = 0.
- 15. A ratio shows the relative sizes of two or more values.
- 16. The longest side of a right triangle. The side opposite the right angle.
- 18. The Father of Geometry.
- 19. An exact location. It has no size, only position.
Down
- 1. 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.
- 2. The line on a graph that runs horizontally (left-right) through zero.
- 5. In a right angled triangle the square of the hypotenuse is equal to the sum of the squares of the other two sides.
- 7. 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.
- 12. The line on a graph that runs vertically (up-down) through zero.
- 14. Two integers are opposites if they are each the same distance away from zero, but on opposite sides of the number line.
- 17. The starting point.On a number line it is 0.