Across
- 5. Bisector - A ray originating from the apex of an angle and bisecting this angle by two equal angles.
- 6. - A four-sided closed shape with equal parallel sides.
- 7. - A quadrilaterals that have two parallel sides and two non-parallel sides.
- 10. - A four-sided regular polygon which is also known as a quadrilateral with four equal sides.
- 11. - A line that passes through two very specific points on a triangle: a vertex, or corner of a triangle, and its opposite side at a right, or 90-degree, angle.
- 13. - The point where three bisectors of the interior angles of a triangle intersect.
- 17. - A line that connects two vertices of a polygon or a solid, whose vertices are not on the same edge.
- 18. - A four-sided shape, also known as a quadrilateral, with congruent sides.
Down
- 1. - A quadrilateral with two pairs of parallel sides.
- 2. - The point where all three altitudes of the triangle intersect.
- 3. - The point at which the three perpendicular bisectors of the sides of a triangle intersect and which is the same distance from each of the three vertices of the triangle.
- 4. Bisector - A line that bisects a line segment in two equal parts and makes an angle of 90 degrees at the point of intersection.
- 8. - A point which is at the same or equal distance from two given points.
- 9. - The middle value in a set of data.
- 12. - Having all sides or faces equal.
- 14. - Having all or corresponding angles equal.
- 15. - The arithmetic mean position of all the points in the surface of the figure.
- 16. - A quadrilateral with reflection symmetry across one of its diagonals.