Math Geometry

2. A rectangle with four equal sides and four right angles.
4. The point where a triangle's three altitudes intersect.
5. The point where a triangle's three medians intersect, dividing each median in a 2:1 ratio.
6. A perpendicular line segment from a vertex to the opposite side (or its extension) of a triangle.
9. A line segment from a triangle's vertex to the midpoint of the opposite side.
11. Having equal distance from two or more points or objects.
12. A line that divides an angle into two equal parts.
16. A parallelogram with four equal sides.
17. A line that intersects the midpoint of a line segment at a right angle.
18. A parallelogram with four right angles.

1. A line segment connecting two non-adjacent vertices of a polygon.
3. The intersection point of the perpendicular bisectors of a triangle's sides, equidistant from all vertices.
7. A quadrilateral with at least one pair of parallel sides.
8. Having all sides of equal length.
10. A quadrilateral with two pairs of adjacent sides of equal length.
13. The point where a triangle's angle bisectors meet, equidistant from all sides.
14. A quadrilateral with opposite sides parallel and equal.
15. Having all angles equal in measure.