Chapter 5 Parallels Flashcards
Exterior angle
the angle formed when a side of a polygon is extended through a vertex. An exterior angle forms a linear pair with the polygon angle to which it is adjacent.
Remote angles
a triangle exterior angle has two remotes. these are the angles of the triangle with which it is not adjacent
parallel lines
lines are parallel when they are coplanar and do not intersect at just one point
parallel segments, parallel rays
two segments (or two rays) are parallel if the lines through them are parallel
skew lines
two lines are skew if they are non-coplanar and do not intersect
transversal
a transversal is a line that intersects each of two other coplanar lines at different points
right triangle
a triangle with a right angle
obtuse angle
an angle is obtuse when it measures greater than 90 and less than 180
