# geometry ch6-12

 geometric mean pythagorean theorem simplifying radicals common right triangles 3,4,55,12,138,15,177,24,25and their multiples triangle theorems special right triangles tangent,sine, cosine circles   arcs congruent chords are equidistant from the center of the circlea diameter perpendicular to the chord bisects its arc and itself inscribed angles   concurrent lines 3 angle bisectors of a triangle intersect in 1 point equidistant from 3 sides of the triangle. 3 perpendicular bisectors of the sides of the triangle intersect in 1 point equidistant from 3 vertices of a triangle 3 altitudes of a triangle intersect in 1 point 3 medians of a triangle intersect in 1 point that is 2/3 of the distance from each vertex to the midpoint of the opposite side. locus a set of all points that satisfy 1 or more conditions Area square= rectangle=b*htrapezoid=1/2h(b1+b2)parallelogram=b*htriangle=1/2b*ha regular polygon=1/2apcircle=(pi) circumference=2(pi)rsector= *(pi) arc length= *2(pi)r ratio of perimeter,area,volume if the scale factor of 2 similar figures are a:b theratio of perimeter is a:bratio of area is ratio of volume is prism La=phta=la+2bvolume=b*h pyramid la=1/2plta=la+bvolume=1/3b*h cylinder la=2(pi)rh=phv=(pi) h=bh cone la=1/2pl=(pi)rlv=1/3bh=1/3(pi) h sphere a=4(pi) v=4/3(pi) distance slope equation of a line setting up coordinate proofs use as few letters as possibleaviod using fractional/radical coordinatestake advantage of the origin/x-axis/y-axis Authorkellantran ID221534 Card Setgeometry ch6-12 Descriptiongeometry Updated2013-05-29T02:17:41Z Show Answers