Geometry terms

2. All four points are inside the triangle
4. A line that intersects the circle at exactly one point
5. Lines Two or more lines that intersect in one point
6. A segment between two points on a circle, which passes through the center of the circle
7. The set of all points in a plane that are equidistant
8. A segment that joins a vertex of a triangle to the midpoint of the opposite side
9. A line that intersects a circle at two points on the circle
11. The point from which all points of the circle are equidistant
12. The point of concurrency of the altitudes of a triangle
13. The point of concurrency of the bisectors of the angles of a triangle
15. A segment on the interior of a circle whose endpoints are on the circle

1. The incenter and centroid are inside; the orthocenter and circumcenter are outside
2. A perpendicular segment from a vertex of the triangle to the line containing the opposite side
3. The incenter and centroid are inside; the orthocenter is on the 90 degree angle; the circumcenter is on the center of the hypotenuse
5. The point of concurrency of the perpendicular bisectors of the sides of a triangle
10. The point of concurrency of the medians of a triangle
14. The segment between the center of a circle and a point on the circle