Geometry study parallel and perpendicular lines 3.1

Study practices for the test

Parallel Lines

two lines that are coplanar that do not touch

Skew Lines

When the lines do not intersect and are not coplanar

Perpendicular Lines

Angles that add up to 90 degrees on a plane, line or surface

Two lines are ____ if and only if they are both vertical lines or they both have the same slope.

Parellel

Two lines are _____ if and only if one is vertical and the other is horizontal or the slopes of the lines are recipricals to eachother,

perpendicular

Two lines are ____ when they do not intersect and they are not coplanar

Skew

A ____ is a line that intersects two or more coplanar lines at different points

transversal

Slope intercept form is….

y=mx+b

To find the parallel of a line you need to switch the ___

Y intercept

To find the perpendicular line of a line you need to_____

Find the reciprical (switch the number) Ex: 6 would switch to 1/6

Find a pair of corresponding angles

<1 & <5, <4&<8, < 3 & <7, <2& <6

Find a pair of oppisite exterior angles

<1 & <6, <4 & <7

Find a pair of oppisite interior angles

< 3 & <8, <2 & <5

Name a pair of consecutive interior angles

< 3 & <5, <2 & <8

Name a pair of vertical angles

<1 & <2, <4 & <3, <5 & <6, <8 & <7

Angles that all ad up to 90 degrees are ….

Complementary

Angles that all add up to 180 degrees are …..

Supplementary

Linear pairs and Consecutive interior both add up to….

180 degrees

Pythagorean theorum formula

a squared + b squared = C squared

he legs in the slope intercept formula are

A & b

The hypotenuse in a slope formula is

C

Corresponding angles theorum

Corresponding angles are congruent

Allternate interior angles theorum

AIA are congruent

Alternate exterior angles theorum

AEA are congruent

What is a way that you can show lines are parellel

Adding an arrow to lines

What does the parallel symbol look like

The parallel symbol is two lines II

What does the perpendicular sign look like

An upside down capital T