# Math chapter 1

 complementary 2 angles added together to equal 90 supplementary 2 angles added to equal 180 adjacent right next to each other vertical angles across and equal to each other linear pairs 2 adjacent angles that form a straight line polygons 3 or more sidesstraight linesno openings vertex where sides of a polygon join together equilateral all sides equal convex all vertices go out equiangular all angles are equal regular all sides are equal and all angles are equal convex all vertices go out concave at least one vertex goes in point represents locationno dimension segment starting and ending point line contains segment but goes on ray specific starting point then goes on collinear points that lie on same line plane 2 dimensions flat Coplanar together on same plane opposite rays lines that share same starting points but go opposite ways intersection to cross segment addition postulate the sum of the parts equals the whole midpoint middle point of a line segment midpoint formula m= x1+x2/2, y1+y2/2 distance formula square root of (x2-x1)2+ (y2-y1)2 angles lines, rays, or segments that intersect vertex point at which lines rays or segments cross to form the angle angle addition postulate sum of the parts equals the whole acute angle +0, -90, right exactly 90 obtuse +90, -180 straight exactly 180 bisect cut in half equal parts Authorsquirty99 ID234556 Card SetMath chapter 1 DescriptionMath chapter 1 Updated2013-09-12T23:44:45Z Show Answers