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24 Cards in this Set
 Front
 Back
Inductive reasoning

patterns


space

set of all points


postulate

geometric facts you assume to be true


theorum

geometric facts you PROVE to be true


opposite rays

two collinear rays with one endpoint


Conditional statement

if...then


biconditional

reverseable, statement and converse are true


law of detachment

1. If A is true, then B.
2. A is true. 3. B is true. 

Law of Syllogism

If p...q and q...r, then p...r


sum of interior angles

180(n2)


How much do exterior angles of a convex polygon add up to?

360 degrees


regular polygon

equilateral and equiangular


m of each interior angle in reg. polygon

[180(n2)]/n or 180360/n


m ex. angles in reg. polygon

360/n


point slope

yy1 = m(x  x1)


slope of horizontal lines

0 slope


slope of vertical lines

no slope


no choice theorum

if two angles of one triangle are congruent to two angles of another, then the triangles are congruent


median

seg joining vertex of a triangle and the midpt of its opposite side


centroid

where the three medians intersect, divides median into ratio of 2:1 from vertex to midpt


altitude:

seg drawn from a vertex of a triangle and perp to the line containing the opposite side
~doesn't have to be inside the triangle ~every triangle has 3 ~3 alts intersect at vertex of rt triangle 

orthocenter

where 3 altitudes intersect


ex. angle theorum

ex. angles r > remotes but <180


two sides of a triangle are....to the third side

ab<c<a+b
