Across
- 2. a line segment that joins a vertex to the mid-point of the side that is opposite to that vertex
- 3. a polygon with 5 sides and 5 angles
- 7. opposite or contrary in position, direction, order, or effect.
- 9. an angle of exactly 90 degrees
- 12. a flat surface or area that extends infinitely in two dimensions and has no thickness
- 13. a point at or near the center or middle
- 15. a figure which is formed by two rays or lines that shares a common endpoint
- 16. the perpendicular drawn from the vertex of the triangle to the opposite side
- 17. the angles that lie opposite to each other when two lines intersect
- 19. a type of quadrilateral, whose opposite sides are equal and parallel
- 20. a line with a single endpoint (or point of origin) that extends infinitely in one direction
Down
- 1. a plane figure with four equal straight sides and four right angles
- 4. An angle smaller than the right angle
- 5. a statement that is assumed to be true based on basic geometric principles
- 6. a one-dimensional figure, which has length but no width
- 8. a line connecting the midpoints between two sides of a triangle
- 10. the total space taken up by a flat (2-D) surface or shape of an object
- 11. a location
- 14. the intersection point of all the three interior angle bisectors of the triangle
- 18. a general proposition not self-evident but proved by a chain of reasoning; a truth established by means of accepted truths.