• #### Lines in Polar Coordinates - Concept

##### Math›Precalculus›Polar Coordinates and Complex Numbers
How to find the polar equation of a line through the origin (or pole).
• #### Introduction to the 3D Coordinate System - Problem 2

##### Math›Precalculus›Vectors and Parametric Equations
How to find the equation of a sphere with radius r when it is centered at the origin.
• #### The Ellipse - Problem 6

##### Math›Precalculus›Conic Sections
How to find the foci of an ellipse that is centered at the origin.
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• #### The Ellipse - Problem 13

##### Math›Precalculus›Conic Sections
Writing the equations for ellipses centered at the origin from the graphs.
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• #### The Ellipse - Problem 16

##### Math›Precalculus›Conic Sections
Translations on an ellipse that is not centered at the origin.
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• #### The Hyperbola - Problem 3

##### Math›Precalculus›Conic Sections
Graphing a hyperbola centered at the origin using the asymptotes.
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• #### The Hyperbola - Problem 4

##### Math›Precalculus›Conic Sections
Finding the foci of a hyperbola centered at the origin.
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• #### The Hyperbola - Problem 4

##### Math›Algebra 2›Conic Sections
Finding the foci of a hyperbola centered at the origin.
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• #### The Ellipse - Problem 5

##### Math›Precalculus›Conic Sections
Writing the equation of an ellipse from a vertex and covertex, centered at the origin.
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• #### The Hyperbola - Problem 3

##### Math›Algebra 2›Conic Sections
Graphing a hyperbola centered at the origin using the asymptotes.
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• #### The Ellipse - Problem 9

##### Math›Precalculus›Conic Sections
Write the equation for an ellipse not centered at the origin from the length of the axes and the center.
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• #### The Ellipse - Problem 5

##### Math›Algebra 2›Conic Sections
Writing the equation of an ellipse from a vertex and covertex, centered at the origin.
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• #### The Ellipse - Problem 6

##### Math›Algebra 2›Conic Sections
How to find the foci of an ellipse that is centered at the origin.
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• #### The Ellipse - Problem 10

##### Math›Precalculus›Conic Sections
Using the length of the axes and the center to write the equation for an ellipse not centered at the origin.
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• #### The Ellipse - Problem 16

##### Math›Algebra 2›Conic Sections
Translations on an ellipse that is not centered at the origin.
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• #### The Ellipse - Problem 13

##### Math›Algebra 2›Conic Sections
Writing the equations for ellipses centered at the origin from the graphs.
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• #### The Ellipse - Problem 11

##### Math›Precalculus›Conic Sections
Writing the ellipse equation from vertex and covertex when not centered at the origin.
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• #### The Ellipse - Problem 14

##### Math›Precalculus›Conic Sections
Writing the equation for an ellipse from co-vertices and foci, centered at the origin.
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• #### The Hyperbola - Problem 5

##### Math›Precalculus›Conic Sections
Using the foci and vertices to write the equation of a hyperbola centered at the origin.
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• #### The Ellipse - Problem 14

##### Math›Algebra 2›Conic Sections
Writing the equation for an ellipse from co-vertices and foci, centered at the origin.
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