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Geometry 2/2
Question | Answer |
---|---|
inductive reasoning | look for a pattern, make a conjecture using examples, use logical reasoning to verify the ocnjecture. |
attributes | a way to characterize items based on these items having the same characteristics |
congruent figures | two figures that have the same shape and size |
similar figures | same shape |
if 2 figures are congruant, then they are ___ | similar |
not always congurant if _____ | similar |
line symmetry | figure can be divided into 2 parts, each of which is the mirror image of the other |
rotational symmetry | the figure is rotated 0 to 180 degrees about its center and the resting figure coincided with the original |
optical illusions | when your eyes see something differently or are tricked into believing something is true when it's not |
point | can be thought of as a dot that represents a location in a plan or space |
line | an infinite number of points extending in both directions |
plane | a flat surgace that extends infinitely in all directions |
segment | a part of a line having two endpoints |
ray | a part of a line having one endpoint |
angle | consists of two different rays that have the same inital point called the vertex |
opposite rays | two rays with a common endpoint going in opposite directions |
adjacent angles | two angles that share a common vertex and side but have no common interior points |
bisect | to cut an object into 2 congruent parts |
segment bisector | a segment that bisects another segment into 2 congruent segments |
angle bisector | a ray that bisects an angle into 2 congruent angles |
midpoint | the point that divides a segment into 2 congruent parts |
collinear | points on the same line |
coplanar | points on the same plane |
exterior points | points contained outside an angle |
interior points | points contained inside an angle |
parallel lines | 2 or more coplanar lines traveling in the same direction and never intersect |
perpendicular lines | 2 coplanar lines that intersect to form 90 degree angles |
postulate | a statement that is accepted as true without proof |
theorem | a rule that has been proven |
segment addition postulate | if B is between A, then AB + BC = AC |
Angle addition postulate | if C is in the interior of angle AOD, then Angle AOC + COD = AOD |