Across
- 4. Statement a statement that is written in the “If p, then q” format.
- 7. A line with a single endpoint (or point of origin) that extends infinitely in one direction.
- 9. A proven idea in mathematics.
- 10. A two-dimensional geometrical shape whose sides are parallel to each other.
- 11. A triangle in which all three sides are in different lengths, and all three angles are of different measures.
- 12. A point that divides the line segment into two equal halves.
- 13. The total space taken up by a flat (2-D) surface or shape of an object.
- 14. The angles that lie opposite to each other when two lines intersect.
- 15. The point where all three altitudes of the triangle intersect.
- 17. A math concept that measures the total length around the outside of a shape.
- 18. An angle which is greater than 90° and less than 180°”.
- 20. A pair of adjacent, supplementary angles.
Down
- 1. A triangle that has all its sides equal in length.
- 2. A statement that is assumed to be true based on basic geometric principles.
- 3. A combination of a conditional statement and its converse written in the if and only if form.
- 5. Two or more lines that are always the same distance apart and never intersect, even if they are extended infinitely in both directions.
- 6. A polygon having four sides, four angles, and four vertices.
- 8. Two lines that meet or intersect each other at right angles.
- 16. A closed two-dimensional polygon with six sides.
- 19. The geometrical concept of a flat surface with no edges or thickness.