Vocab

1. the point at which the three perpendicular bisectors of the sides of a triangle. intersect and is the same distance as the three vertices of the triangle.
3. Bisector, a ray, segment, or line that divides a given angle into two angles of equal measures.
4. Bisector, a bisector with a right angle.
6. quadrilateral whose four sides can be grouped into two pairs of equal-length sides that are adjacent to each other.
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.
14. a plane figure with four straight sides and four right angles, especially one with unequal adjacent sides.
15. having equal angles.
16. a four-sided plane rectilinear figure with opposite sides parallel.
18. a plane figure with four equal straight sides and four right angles.

2. the center of mass of a geometric object of uniform density.
5. equal distance.
7. the middle number in a sorted list of numbers.
8. having all its sides of the same length.
9. intersection point of the altitudes drawn from the vertices of the triangle to the opposite sides.
10. a quadrilateral with only one pair of parallel sides.
12. a line segment joining two vertices.
13. the center of the incircle of a triangle or other figure.
17. a parallelogram with opposite equal acute angles, opposite equal obtuse angles, and four equal sides.