Flow Proof Terms

Math 2

congruent segment

segments with equal lenghts

congruent angles

angles with equal measures

midpoint

point that divides a segment into 2 congruent segments

segment bisector

line (or part of a line) that intersects the segment at its midpoint

angle bisector

ray that divides an angle into 2 congruent angles

right angle

angle whose measure is 90 degrees

theorem (right angles):

all right angles are congruent

right triangle

triangle that contains a right angle

perpendicular lines

lines (or part of lines) that intersect to form a right angle(s)

perpendicular bisector

line (or part of a line) that is perpendicular to a segment at its midpoint

supplementary angles

2 angles whose measure have a sum to 180 degrees

complementary angles

2 angels whose measure have a sum to 90 degrees

linear pair (draw example)

2 adjacent angels whose non-common sides are opposite rays

postulate:

linear pairs are supplementary

vertical angles (draw example)

non-adjacent angles formed by 2 intersecting lines

theorem (vertical angles):

vertical angles are congruent

reflexive property of congruents (draw example)

a geometric figure is congruent to itself

transitive property of congruents

if one geometric figure is congruent to a 2nd geometric figure and the 2nd geometric figure is congruent to a 3rd geometric figure, then the 1st geometric figure is congruent to the 3rd geometric figure (links across congruence statements)