Across
- 1. The letters of ancient Greece, which are frequently used in math and science and denoted by Ψ ψ.
- 6. For a triangle, this is the point at which the three medians intersect.
- 8. The number 10 to the power 100,this number can be written as a 1 followed by 100 zeros.
- 10. A sphere-like surface for which all cross-sections are ellipses.
- 13. A curve shaped like a spring, it can be made by coiling a wire around the outside of a right circular cylinder.
- 16. The four sections into which the x-y plane is divided by the x- and y-axes.
- 18. A helping theorem.It is proven true, just like a theorem, but is not interesting or important enough to be a theorem. It is of interest only because it is a stepping stone towards the proof of a theorem.
- 21. Similar geometric figures that share a common center.
- 22. A part of a line starting at a particular point and extending infinitely in one direction.
- 23. A statement accepted as true without proof, it should be so simple and direct that it seems to be unquestionably true.
- 24. Set The set with no elements. The empty set can be written or {} and also known as empty set.
- 26. Measurement of geometric figures and includes length, angle measure, area, volume.
- 27. Quadrilateral with two pairs of adjacent sides that are congruent,also it's diagonals are perpendicular.
- 28. A polygon with eleven sides.
- 29. A family of related curves usually expressed in polar coordinates. The cardioid is a special kind in it.
- 31. a doughnut shape. It is a surface of revolution obtained by revolving (in three dimensional space) a circle about a line which does not intersect the circle.
Down
- 2. A three dimensional solid consisting of all points equidistant from a given point. This point is the center of the geometrical figure and all cross-sections are circles.
- 3. A polynomial with two terms which are not like terms.eg 2x – 3, 3x5 +8x4, and 2ab – 6a2b5.
- 4. A special case of a more general theorem which is worth noting separately. For example, the Pythagorean theorem is a ______ of the law of cosines.
- 5. A mathematical sentence built from expressions using one or more equal signs (=).
- 7. A parallelogram with four congruent sides and the diagonals are perpendicular.
- 9. Any polyhedron with six faces, all of which are quadrilaterals,a regular geometric figure is a cube.
- 11. The letters of ancient Greece, which are frequently used in math and science and denoted by Σ σ.
- 12. A transformation that is invariant with respect to distance. That is, the distance between any two points in the pre-image must be the same as the distance between the images of the two points.
- 14. A polyhedron with six faces, all of which are parallelograms.
- 15. The eight regions into which three dimensional space is divided by the x-, y-, and z-axes.
- 17. The property of real numbers which guarantees that for any two real numbers a and b, exactly one of the following must be true: a < b, a = b, or a > b.
- 19. A line segment, line, or plane that divides a geometric figure into two congruent halves.
- 20. A polygon with ten sides.
- 25. A number which is a multiply by five.
- 30. A rectangular (or square) array of numbers, it can be written using brackets or parentheses.