• #### Area of Triangles - Concept

##### Math›Geometry›Area
How to derive the area of a triangle formula using the rectangle area formula.
• #### Recursion Sequences - Problem 5

##### Math›Algebra 2›Sequences and Series
Finding the explicit formula, recursive formula, or both for a given number pattern.
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• #### Recursion Sequences - Problem 6

##### Math›Precalculus›Sequences and Series
Writing recursive formulas for given number patterns, and using the formula to find the next few terms.
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• #### The Circle - Problem 4

##### Math›Precalculus›Equations of Lines, Parabolas and Circles
How to use two endpoints of a diameter to create the equation for a circle.
• #### The Circle - Problem 4

##### Math›Algebra 2›Conic Sections
How to use two endpoints of a diameter to create the equation for a circle.
• #### Recursion Sequences - Problem 6

##### Math›Algebra 2›Sequences and Series
Writing recursive formulas for given number patterns, and using the formula to find the next few terms.
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• #### Area of Kites and Rhombuses - Concept

##### Math›Geometry›Area
How to derive the area formula of a kite based on the rectangle formula; how to calculate the area of a rectangle using diagonal lengths.
• #### Area of Circles - Concept

##### Math›Geometry›Area
How to derive the formula to calculate the area of a circle.
• #### Recursion Sequences - Problem 2

##### Math›Precalculus›Sequences and Series
How to generate terms of a number pattern from a recursive formula.
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• #### Area of Parallelograms - Concept

##### Math›Geometry›Area
How to find the area of any parallelogram using rectangle area formulas.
• #### Area of Trapezoids - Concept

##### Math›Geometry›Area
How to derive the area of a trapezoid formula using the area of a rectangle.
• #### Recursion Sequences - Problem 3

##### Math›Precalculus›Sequences and Series
Determining whether given formulas are recursive or explicitly defined.
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• #### Recursion Sequences - Problem 4

##### Math›Precalculus›Sequences and Series
How to write both explicit and recursive formulas for the same number pattern
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• #### Geometric Series - Problem 14

##### Math›Precalculus›Sequences and Series
Clarity on notation and formulas of geometric sequences and series.
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• #### Area of an Annulus - Concept

##### Math›Geometry›Area
How to derive the formula for the area of an annulus.
• #### Arithmetic Sequences - Problem 16

##### Math›Precalculus›Sequences and Series
Writing the first four terms of an arithmetic sequence from an explicit formula.
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• #### Arithmetic Sequences - Problem 17

##### Math›Precalculus›Sequences and Series
How to find the hundredth term in an arithmetic sequence using the explicit formula.
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• #### Recursion Sequences - Problem 1

##### Math›Precalculus›Sequences and Series
How to interpret a recursive formula.
• #### Area and Perimeter of Circles - Concept

##### Math›Pre-Algebra›Introductory Geometry
Vocabulary and formulas for the area of a circle
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• #### Area of a Segment - Concept

##### Math›Geometry›Area
How to derive the area of a segment formula.