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Beat the Computer!. Geometry Vocabulary and Formulas for Unit 1. Directions: A slide will appear with a term Say the definition aloud before the computer can answer (5 sec.) You will hear a sound when the slide changes. inductive reasoning.
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Beat the Computer! Geometry Vocabulary and Formulas for Unit 1 Chris Giovanello, LBUSD Math Curriculum Office, 2004
Directions: • A slide will appear with a term • Say the definition aloudbefore thecomputer can answer (5 sec.) • You will hear a sound when the slide changes Chris Giovanello, LBUSD Math Curriculum Office, 2004
inductive reasoning Chris Giovanello, LBUSD Math Curriculum Office, 2004
Using the pattern, what is the next term in the sequence? inductive reasoning: reasoning based on patterns you observe Chris Giovanello, LBUSD Math Curriculum Office, 2004
conjecture Chris Giovanello, LBUSD Math Curriculum Office, 2004
“Based on the pattern, I think the answer is…” conjecture: a conclusion reached when using inductive reasoning Chris Giovanello, LBUSD Math Curriculum Office, 2004
counterexample Chris Giovanello, LBUSD Math Curriculum Office, 2004
counterexample: an example for which a conjecture is false Conjecture: All integers are natural numbers. Counterexample: -1 Chris Giovanello, LBUSD Math Curriculum Office, 2004
point Chris Giovanello, LBUSD Math Curriculum Office, 2004
point: a location in space having no size P Chris Giovanello, LBUSD Math Curriculum Office, 2004
space Chris Giovanello, LBUSD Math Curriculum Office, 2004
space: the set of all points Chris Giovanello, LBUSD Math Curriculum Office, 2004
line Chris Giovanello, LBUSD Math Curriculum Office, 2004
line: a series of points that extends in two opposite directions without end t P Q line t or or Chris Giovanello, LBUSD Math Curriculum Office, 2004
collinear points Chris Giovanello, LBUSD Math Curriculum Office, 2004
Y Z Z Y X X Line l Line l non-collinear collinear collinear points: points that lie on the same line Chris Giovanello, LBUSD Math Curriculum Office, 2004
plane Chris Giovanello, LBUSD Math Curriculum Office, 2004
P B C A Plane ABC Plane P plane: a flat surface that has no thickness Chris Giovanello, LBUSD Math Curriculum Office, 2004
coplanar Chris Giovanello, LBUSD Math Curriculum Office, 2004
Line m Line m X Y Y Line l Line l X non-coplanar coplanar coplanar: points and lines that lie in the same plane Chris Giovanello, LBUSD Math Curriculum Office, 2004
postulate or axiom Chris Giovanello, LBUSD Math Curriculum Office, 2004
postulate or axiom: a statement that is accepted as true without proof Example: Through any two points there is exactly one line. Chris Giovanello, LBUSD Math Curriculum Office, 2004
segment Chris Giovanello, LBUSD Math Curriculum Office, 2004
Segment AB B A endpoint endpoint segment: the part of a line consisting of two endpoints and all the points between them Chris Giovanello, LBUSD Math Curriculum Office, 2004
ray Chris Giovanello, LBUSD Math Curriculum Office, 2004
ray: the part of a line consisting of two endpoints and all the points between them Ray YX Y X endpoint Chris Giovanello, LBUSD Math Curriculum Office, 2004
opposite rays Chris Giovanello, LBUSD Math Curriculum Office, 2004
and are opposite rays opposite rays: two collinear rays with the same endpoint X R S Chris Giovanello, LBUSD Math Curriculum Office, 2004
parallel lines Chris Giovanello, LBUSD Math Curriculum Office, 2004
parallel lines: coplanar lines that do not intersect Chris Giovanello, LBUSD Math Curriculum Office, 2004
skew lines Chris Giovanello, LBUSD Math Curriculum Office, 2004
skew lines: lines that do not lie in the same plane Chris Giovanello, LBUSD Math Curriculum Office, 2004
parallel planes Chris Giovanello, LBUSD Math Curriculum Office, 2004
A B D C E F H G parallel planes: planes that do not intersect Plane ABCD is parallel to Plane EFGH Chris Giovanello, LBUSD Math Curriculum Office, 2004
congruent () segments Chris Giovanello, LBUSD Math Curriculum Office, 2004
5 cm A A B B AB = CD 5 cm AB = CD C C D D congruent segments: segments with the same length Chris Giovanello, LBUSD Math Curriculum Office, 2004
midpoint of a segment Chris Giovanello, LBUSD Math Curriculum Office, 2004
B C A midpoint of a segment: a point that divides a segment into two congruent segments Chris Giovanello, LBUSD Math Curriculum Office, 2004
angle Chris Giovanello, LBUSD Math Curriculum Office, 2004
vertex angle: two rays with the same endpoint Chris Giovanello, LBUSD Math Curriculum Office, 2004
acute angle Chris Giovanello, LBUSD Math Curriculum Office, 2004
acute angle: an angle whose measure is between 0º and 90º Chris Giovanello, LBUSD Math Curriculum Office, 2004
right angle Chris Giovanello, LBUSD Math Curriculum Office, 2004
right angle: an angle whose measure is exactly 90º Chris Giovanello, LBUSD Math Curriculum Office, 2004
obtuse angle Chris Giovanello, LBUSD Math Curriculum Office, 2004
obtuse angle: an angle whose measure is between 90º and 180º Chris Giovanello, LBUSD Math Curriculum Office, 2004
straight angle Chris Giovanello, LBUSD Math Curriculum Office, 2004
straight angle: an angle whose measure is exactly 180º Chris Giovanello, LBUSD Math Curriculum Office, 2004
congruent angles Chris Giovanello, LBUSD Math Curriculum Office, 2004
congruent angles: angles with the same measure Chris Giovanello, LBUSD Math Curriculum Office, 2004