Math15dunn8

4. a quadrilateral with four equal sides. Its opposite sides are parallel, and opposite angles are equal.
6. a closed 2-D shape, having 4 sides, 4 corners, and 4 right angles
8. the height of an object or point in relation to sea level or ground level.
12. the center of mass of a geometric object of uniform density.
14. the point where the perpendicular bisectors of the sides of that particular triangle intersect
15. the point where the perpendicular drawn from the vertices to the opposite sides of the triangle intersect each other
17. a ray, segment, or line that divides a given angle into two angles of equal measures.
18. a four-sided shape which has one pair of sides as parallel

1. a line that bisects a line segment in two equal parts and makes an angle of 90 degrees at the point of intersection
2. a triangle in which all three sides have the same length
3. a quadrilateral with two pairs of parallel sides
5. 4 right angles
7. a quadrilateral with reflection symmetry across a diagonal
9. at equal distances
10. a line segment joining a vertex to the midpoint of the opposite side, thus bisecting that side.
11. the center of the incircle of a triangle or other figure.
13. a line segment connecting the opposite vertices or the non-adjacent vertices of a polygon
16. a triangle in which angles are congruent and all sides are of equal length