Geometry Unit 4 Vocabulary

2. a segment, ray, line, or plane that is perpendicular to a segment at its midpoint.
6. triangle bisector of the angles of a triangle intersect at a point.
10. a perpendicular segment from a vertex to the line containing the opposite side.
11. point of concurrency of the three altitudes of a triangle.
12. point where all the angle bisectors meet in the triangle.
13. a segment, ray, line, or plane that intersects a segment at its midpoint.
15. a point at which the perpendicular bisectors of the sides of a triangle intersects which equidistant from three vertices.
17. two geometric figures are congruent figures if they have the same size and shape.
18. segment that connects that midpoint of two sides of a triangle.
19. a line, segment or ray that divides angle into two congruent parts.

1. two quantities always have the same size/ratio to each other.
3. two interior angle of two triangles are congruent when the two triangles are similar.
4. two triangles are congruent if their corresponding sides are equal in length, and their corresponding angles are equal in measure.
5. angles at each vertex that are on the inside of the polygon.
7. when a point is the same distance from two or more objects.
8. two figures that have the same shape, but not necessarily the same size.
9. line segment drawn from a vertex to the midpoint of the opposite side of the vertex.
14. either of the angles of a triangle that have one side in common with the base.
16. medians always inside, divides median in 2:1 ratio.