Unit One Geometry Flashcards
The parts of an object add to the whole
Partition Postulate (Partition)
A point that divides a line segment into two equal parts
Definition of Midpoint (Def Midpoint)
A line segment that cuts another line segment into two equal parts
Definition of Segment Bisector (Def Seg. Bisector)
A line that connects the vertex of a triangle to the midpoint of the side opposite
Definition of Median (Def Median)
The centroid of a triangle is the point of intersection for all medians in a triangle
Definition of Centroid (Def Centroid)
Two angles on a line, that add to 180
Linear Pairs (LP Are Supp.)
Two angles opposite each other will always be congruent
Vertical Angles (Vertical ∠’s =)
Two angles that measure 90° in sum
Complementary Angles Add to 90 (Comp. ∠’s Add 90)
Two angles that measure 180° in sum
Supplementary Angles Add to 180 (Supp. ∠’s Add 180)
Two lines that intersect to make a right angle
Perpendicular Lines Make Right Angles (⟂ Lines Make Right ∠’s)
Any segment that divides an angle into two congruent parts
Definition of Angle Bisector (Def ∠ Bisector)
A line segment from a vertex, perpendicular to the opposite side
Definition of Altitude (Def Altitude)