# Fundamental Concepts

 .remove_background_ad { border: 1px solid #555555; padding: .75em; margin: .75em; background-color: #e7e7e7; } .rmbg_image { max-height: 80px; } directed line one direction is (+) & other (-) directed line segment segment of line containing any 2 points & in between directed distances distances in figure denoted undirected distances length of segment (+) x-coordinate abscissa y-coordinate ordinate inclination angle greater than or equal to zero degreesformed from a line & (+) x-axispositive direction (rotation CCW) slope ratiorise/run=change y/change xm=tan theta formula for angle between two lines tan theta=m2-m1/1+m2m1 rules for an angle between two lines psi must be in CCWm1 must be initial sidem2 must be terminal side formula for division of line segment ratio= part length/total length scalene triangle coordinate proof (0,0) (a,0) (b,c) isosceles triangle coordinate proof (0,0) (a,0) (a/2,b) right triangle coordinate proof (0,0) (a,0) (0,b) equilateral coordinate proof (0,0) (a,0) (a/2, a/2 root 3) parallelogram coordinate proof (0,0) (a,0) (b,c) (a+b,c) rectangle coordinate proof (0,0) (a,0) (0,b) (a,b) square coordinate proof (0,0) (a,0) (0,b) (a,a) trapezoid coordinate proof (0,0) (a,0) (b,c) (d,c) isosceles trapezoid coordinate proof (0,0) (a,0) (b,c) (a-b,c) rhombus coordinate proof (0,0) (a,0) (b, root a2 - b2) (a+b, root a2 - b2) quadrilateral coordinate proof (0,0) (a,0) (b,c) (d,e) .remove_background_ad { border: 1px solid #555555; padding: .75em; margin: .75em; background-color: #e7e7e7; } .rmbg_image { max-height: 80px; } Authorht2lvu ID3827 Card SetFundamental Concepts Descriptionchapter 1: fundamental concepts of analytic geometry Updated2010-01-13T06:35:26Z Show Answers