# number line   139 videos

• #### Atomic Number - Isotopes

##### ChemistryThe Atom

The meaning and uses of atomic numbers.

atomic number mass number isotopes ions
• #### Line Segments

##### GeometryGeometry Building Blocks

How to define and label a line segment.

line endpoint points
• #### Constructing a Perpendicular at a Point on a Line

##### GeometryConstructions

How to construct a perpendicular line at a point on a line.

perpendicular point on the line construct
• #### Multiplying Complex Numbers

##### Algebra 2Roots and Radicals

How to multiply imaginary numbers.

complex numbers multiplying i
• #### Parallel and Skew Lines

##### GeometryGeometry Building Blocks

How to mark parallel lines, how to show lines are parallel, and how to compare skew and parallel lines.

parallel lines skew lines coplanar collinear
• #### Parallel and Skew Lines

##### PrecalculusEquations of Lines, Parabolas and Circles

How to mark parallel lines, how to show lines are parallel, and how to compare skew and parallel lines.

parallel lines skew lines coplanar collinear
• #### Quantum Numbers

##### ChemistryThe Atom

How to identify a specific electron in an atom's electron cloud using quantum numbers.

quantum numbers electrons
• #### Adding and Subtracting Complex Numbers

##### Algebra 2Roots and Radicals

How to add and subtract complex numbers.

adding and subtracting complex numbers
• #### Parallel Planes and Lines

##### GeometryGeometry Building Blocks

How to identify parallel lines, a line parallel to a plane, and two parallel planes.

parallel lines skew plane
• #### Parallel Planes and Lines

##### PrecalculusEquations of Lines, Parabolas and Circles

How to identify parallel lines, a line parallel to a plane, and two parallel planes.

parallel lines skew plane
• #### Standard Form of a Line

##### Algebra 2Graphs of Linear Equations

How to use standard form of a line.

standard form of a line
• #### Dividing Complex Numbers

##### Algebra 2Roots and Radicals

How to rationalize the denominator when dealing with an imaginary number.

dividing by i complex numbers
• #### Introduction to Imaginary Numbers

##### Algebra 2Roots and Radicals

How to define an imaginary number.

imaginary number i square root of a negative
• #### Converse of Parallel Lines Theorem

##### GeometryReasoning, Diagonals, Angles and Parallel Lines

How to take the converse of the parallel lines theorem.

parallel lines theorem transversal
• #### Converse of Parallel Lines Theorem

##### PrecalculusEquations of Lines, Parabolas and Circles

How to take the converse of the parallel lines theorem.

parallel lines theorem transversal
• #### Lines in 3D

##### PrecalculusVectors and Parametric Equations

How to find the vector and parametric equations of a line when given two points on the line.

the vector equation of a line position vectors direction vector parametric equations
• #### Angle Inclination of a Line

How to find the angle of inclination of a line.

angle inclination horizontal lines tangent slope
• #### Angle Inclination of a Line

How to find the angle of inclination of a line.

angle inclination horizontal lines tangent slope
• #### Point-Slope Form of a Line

##### Algebra 2Graphs of Linear Equations

How to use point-slope form of a line.

point slope form equation of a line
• #### The Number e and the Natural Logarithm

##### PrecalculusExponential and Logarithmic Functions

How the number e is defined.

exponential functions graphing exponential functions tangent lines the definition of e