Picture:ġ5 14) congruent Symbol: Congruent Line Segments – Line segments that have the same length.

Picture:ġ3) Coplanar Points that lie in the SAME PLANE. Formula:ġ4 Points that lie in the SAME PLANE.

Picture:ġ2) Distance The length of a line segment. Picture:Īn ALTITUDE of a triangle is a line segment that connects from a vertex and is PERPENDICULAR to the opposite side. Picture:ġ1 10) Median of a triangle A MEDIAN of a triangle is a line segment that connects from a vertex to the MIDPOINT of the opposite side. The slopes of these lines are negative reciprocals of each other. Picture:ġ0 9) Perpendicular lines Symbol: Lines that intersect to form right angles (90 degrees). Picture:ĩ 8) SEGMENT Bisector This is a line that divides the segment in half, at the midpoint, creating 2 congruent segments. To figure out if points are collinear, Pick any 2 pairs of points and find the slope of the segment between them (If they have the same slope, they are collinear) (If they have different slopes, they are NOT collinear) Picture: X Y ZĨ 7) Midpoint The MIDDLE point or CENTER point of a line segment that creates 2 congruent segments. S Picture: R Name and Symbol: RSħ 6) COLLINEAR Points that lie on the SAME line. Picture: kĦ 5) ray Consists of an endpoint on one side and continues on in the other direction, infinitely. Picture: C D Name and Symbol: CDĥ 4) Plane A FLAT SURFACE made up of points that has 2 dimensions and continues on in all directions. Picture: A B Symbol: ABĤ 3) Line segment Consists of 2 endpoints and all the points between them. Pģ 2) Line Continues on in BOTH directions, infinitely. tHESE SHOULD also be DONE ON INDEX CARDS AND YOU SHOULD BE CONSTANTLY REVIEWING THEM AS WE GO!Ģ 1) point A location in space that is represented by a dot and has no dimension.

Geometry vocab