Vocabulary geometry

3. the point where all three perpendicular bisectors of the triangle's sides intersect
4. matching parts (sides or angles) between two triangles that occupy the same relative position within each triangle
7. the point where all three medians of the triangle intersect
9. the point where all three altitudes of the triangle intersect
11. a point that is the same distance away from all three vertices of the triangle
13. center the point of intersection of all the three interior angle bisectors of the triangle
14. bisector a ray, segment, or line that divides a given angle into two angles of equal measures

1. bisector the line segment that is drawn from a vertex to the opposite side bisecting the side at a right angle
2. lines a set of three or more lines within a triangle that all intersect at a single point
5. when a line is drawn parallel to one side of a triangle, it divides the other two sides into segments that are proportional to each other, meaning their ratios are equal
6. of concurrency the single point where three or more lines drawn within the triangle intersect with each other
8. a line segment joining a vertex of the triangle to the midpoint of the opposite side, thus bisecting that side
10. a line segment drawn perpendicularly from a vertex of a triangle to the opposite side
12. figures two triangles that have the same shape but may be different sizes