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### 24 Cards in this Set

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 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(n-2) 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(n-2)]/n or 180-360/n m ex. angles in reg. polygon 360/n point slope y-y1 = 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 a-b