math definitions unit 1:4-1:5

perpendicular lines

Two lines that intersect to form a right angle. (unit 1:4)

parallel lines

Two lines that do not intersect. (It's important to note that two lines will be parallel if they never intersect, since lines extend infinitely in both directions.) (unit 1:4)

segment bisector

A line that divides a segment into two congruent parts.

perpendicular bisector

 If a segment bisector is also perpendicular to the segment (unit 1:4)

angle bisector

A line or ray that divides an angle into two congruent angles (unit 1:4)

circumcenter

The intersection point of the perpendicular bisectors of a triangle. (1:4)

circumscribed circle

a drawn circle that fits around a triangle and touches all 3 vertices with it's center at the circumcenter. (unit 1:4)

insector

The point found by the intersection of the angle bisectors (1:4)

Inscribed Circle

The incenter is the center of a circle that can be inscribed inside the triangle and touch each side of the triangle. (unit 1:4)

centroid

is the point created by the intersection of the medians. (unit 1:4)

median

A segment from the midpoint of a segment (side of the triangle) to the opposite vertex of the triangle. (unit 1:4)

orthocenter

 is the point created by finding the altitudes of each of the sides of a triangle. (unit 1:4)

altitude

 is a perpendicular line segment from a vertex to the line containing the opposite side. (unit 1:4)

rigid transformation

a transformation does not change the size or shape of a figure. The three rigid transformations are Translations, Rotations, and Reflections. (unit 1:5)

transformation

a sort of 'slide' of an object. every point of a figure is moved in a straight line, the same distance, in the same direction. (unit 1:5)

rotation

is where every point of a figure moves around a given point. This point is known as the center of rotation, and all points move the same angle measure. (unit 1:5)

reflection

 is where a designated line acts as the mirror, and each point from a figure is reflected across that line. (unit 1:5)