Geometry Crossword Puzzle

2. A triangle that has all its sides equal in length.
3. A triangle in which all three sides are in different lengths, and all three angles are of different measures.
5. A polygon having four sides, four angles, and four vertices.
6. A line with a single endpoint (or point of origin) that extends infinitely in one direction.
9. A combination of a conditional statement and its converse written in the if and only if form.
12. A closed two-dimensional polygon with six sides.
13. The geometrical concept of a flat surface with no edges or thickness.
14. An angle which is greater than 90° and less than 180°”.
16. A point that divides the line segment into two equal halves.
17. A pair of adjacent, supplementary angles.
18. The angles that lie opposite to each other when two lines intersect.
19. A statement that is assumed to be true based on basic geometric principles.
20. The total space taken up by a flat (2-D) surface or shape of an object.
21. A math concept that measures the total length around the outside of a shape.

1. Two lines that meet or intersect each other at right angles.
4. Two or more lines that are always the same distance apart and never intersect, even if they are extended infinitely in both directions.
7. The perpendicular drawn from the vertex of the triangle to the opposite side.
8. A proven idea in mathematics.
10. Statement a statement that is written in the “If p, then q” format.
11. The point where all three altitudes of the triangle intersect.
15. A two-dimensional geometrical shape whose sides are parallel to each other.