Geometry Terms - chapter 3 Flashcards
alternate exterior angles
when two lines are intersected by a transversal, they create a pair of angles lying on opposite sides of the transversal and outside the other two lines
alternate interior angles
when two lines are intersected by a transversal, they create a pair of nonadjacent angles lying on opposite sides of the transversal and between the other two lines
corresponding angles
when two lines are intersected by a transversal, they create a pair of angles lying on the same side of the transversal and on the same sides of the other two lines
distance from a point to a line
the length of the perpendicular segment from the point to the line
parallel lines
lines in the same plane that do not intersect
parallel planes
planes that do not intersect
perpendicular bisector of a segment
a line perpendicular to a segment at its midpoint
perpendicular lines
lines that intersect at 90 degree angles
point-slope form
y -y1 = m(x - x1), where “m” is the slope of the line and (x1, y1) is a point on the line
rise
the difference in the y-values of two points on a line
run
the difference in the x-values of two points on a line
same-side interior angles
when two lines are intersected by a transversal, they create a pair of angles lying on the same side of the transversal and between the two lines
skew lines
lines that are not coplanar
slope
a measure of the steepness of a line - the slope of a line is m = (y2 - y1)/(x2 - x1)
slope-intercept form
y = mx + b, where “m” is the slope and “b” is the y-intercept
