lines 71 videos

Corresponding Angles
Geometry Reasoning, Diagonals, Angles and Parallel Lines
How to define corresponding angles and their special properties.
parallel lines angles congruence 
Graphing Equations by Making a Table of Values
PreAlgebra Graphing in Two Dimensions
Graphing a line by making a table of values

Definitions and Applications of Absolute Value
Algebra Absolute Value
What is absolute value?
absolute value number line distance 
Rays
Geometry Geometry Building Blocks
How to identify, define, and label rays and opposite rays.
ray line endpoint opposite rays 
Finding the Slope of a Line from 2 Points
Algebra Linear Equations and Their Graphs
How to find the slope if you're given 2 points.
slope point ratio 
PointSlope Form of Linear Equations
Algebra Linear Equations and Their Graphs
How to write the equation of a line in pointslope form.
slope equation 
Comparing Fractions
PreAlgebra Fractions and MIxed Numbers
Comparing fractions using < or > and ordering them on the number line

Addition and Subtraction with Decimals
PreAlgebra Decimals and Percents
Adding or subtracting decimals by vertically lining up the zeros

Graphing One Variable Inequalities
PreAlgebra Solving Equations and Inequalities
Graphing one variable inequalities on a number line

Alternate Interior Angles
Geometry Reasoning, Diagonals, Angles and Parallel Lines
How to define alternate interior angles and their special properties.
parallel lines angles congruence interior transversal 
Alternate Exterior Angles
Geometry Reasoning, Diagonals, Angles and Parallel Lines
How to define alternate exterior angles and their special properties.
parallel lines angles congruence exterior transversal 
Same Side Interior and Same Side Exterior Angles
Geometry Reasoning, Diagonals, Angles and Parallel Lines
How to describe same side interior and same side exterior angles and their special properties.
parallel lines angles congruence interior exterior transversal 
Constructing an Angle Bisector
Geometry Constructions
How to define and construct an angle bisector.
construction perpendicular equidistant shortest distance to a line bisector 
The Definition of the Derivative
Calculus The Derivative
How to define the derivative of a function at a point x=a.
average rate of change slope secant line instantaneous rate of change tangent line limits derivative difference quotient 
Writing Equations in SlopeIntercept Form
Algebra Linear Equations and Their Graphs
How to write the equation of a line using slopeintercept form.
slope y intercept slope intercept form 
Radii to Tangents
Geometry Circles
How to define a tangent line; how to determine the angle a radius to a tangent forms.
tangent radius right angle point outside the circle perpendicular 
Adding and Subtracting
PreAlgebra Whole Numbers
Using the number line to represent adding and subtracting whole numbers

Graphing from SlopeIntercept form
PreAlgebra Graphing in Two Dimensions
Concept of slope and graphing lines using the slope and y intercept