• #### Center of Mass

##### Science›Physics›Gravitation
Finding an object's center of mass.
• #### Chords and a Circle's Center - Problem 2

##### Math›Geometry›Circles
How to find the center of a circle given only an arc.
• #### Chords and a Circle's Center - Concept

##### Math›Geometry›Circles
How to define a chord; how to describe the effect of a perpendicular bisector of a chord and the distance from the center of the circle.
• #### Chords and a Circle's Center - Problem 3

##### Math›Geometry›Circles
How to find the radius of a circle when the length of a chord and its distance to the center of the circle is given.
• #### Center and Apothem of Regular Polygons - Concept

##### Math›Geometry›Area
How to define the apothem and center of a polygon; how to divide a regular polygon into congruent triangles.
• #### Measures of Center - Problem 3

##### Math›Pre-Algebra›Introductory Statistics
Create a data set where the measures of center have given relationships
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• #### Measures of Center - Problem 1

##### Math›Pre-Algebra›Introductory Statistics
Comparing the mean, median, and mode of a data set and deciding which best represents the center
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• #### Chords and a Circle's Center - Problem 1

##### Math›Geometry›Circles
How to find the length of two chords where the length of the perpendicular bisectors are given.
• #### Center and Apothem of Regular Polygons - Problem 1

##### Math›Geometry›Area
How to find the length of an apothem in a regular polygon given a side length and the number of sides.
• #### Measures of Center - Concept

##### Math›Pre-Algebra›Introductory Statistics
Overview of how to calculate and when to use mean, median, and mode
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• #### Measures of Center - Problem 2

##### Math›Pre-Algebra›Introductory Statistics
Determining whether a data set is best represented by the mean, median, or mode
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• #### The Midpoint and Distance Formulas in 3D - Problem 4

##### Math›Precalculus›Vectors and Parametric Equations
How to find the center and radius of a sphere when its equation is not in center-radius form by completing the square.
• #### The Circle - Problem 1

##### Math›Precalculus›Conic Sections
How to find the equation for a circle given the center and radius.
• #### The Circle - Problem 3

##### Math›Precalculus›Conic Sections
How to find the center and radius of a circle by completing the square.
• #### The Circle - Problem 3

##### Math›Algebra 2›Conic Sections
How to find the center and radius of a circle by completing the square.
• #### The Circle - Problem 1

##### Math›Algebra 2›Conic Sections
How to find the equation for a circle given the center and radius.
• #### Equation of a Circle - Problem 3

##### Math›Geometry›Pythagorean Theorem
How to write the equation of a circle given the center and a point on the circle.
• #### Equation of a Circle - Problem 1

##### Math›Trigonometry›Pythagorean Theorem
How to write the equation of a circle given the center and a point on the circle.
• #### Equation of a Circle - Problem 1

##### Math›Geometry›Pythagorean Theorem
How to write the equation of a circle given the center and a point on the circle.
• #### The Circle - Problem 1

##### Math›Precalculus›Equations of Lines, Parabolas and Circles
How to find the equation for a circle given the center and radius.