Geometry Unit 4 Flashcards
parallel planes
planes that never intersect
skew lines
non-coplanar lines that never intersect (must 1 be horizontal and 1 be vertical)
transversal
a line that intersects 2 or more lines.
corresponding angles
angles on the same side of the transversal and in the same position
alternate interior angles
interior angles, non-adjacent, and on opp. sides of the transversal
alternate exterior angles
exterior angles, non-adjacent, and on opp. sides of the transversal
consecutive interior angles
interior angles that are on the same side of the transversal
corresponding angles are
congruent
consecutive exterior angles
exterior angles that are on the same side of the transversal
alternate angles are
congruent
alternate exterior angles are
congruent
consecutive angles are
supplementary
when given ordered pairs, how do you find the slope?
y2-y1/x2-x
parallel lines have the _____ slope
same
perpendicular lines have the _____ slope
neg. reciprical
point slope form
y-y1=m(x-x1)
standard form
ax+by=c
a vertical line is written in the form
x=a
vertical line slope
m=no slope
a horizontal line is written in the form
y=a
horizontal line slope
zero slope
