• #### Area and Perimeter of Rectangles - Concept

##### Math›Pre-Algebra›Introductory Geometry
Overview of area and perimeter formulas for parallelograms and rectangles
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• #### Approximating Area Using Rectangles - Concept

##### Math›Calculus›The Definite Integral
How to approximate the area under a curve using rectangles.
• #### Area and Perimeter of Rectangles - Problem 3

##### Math›Pre-Algebra›Introductory Geometry
Finding area and perimeter of parallelograms with variables in side lengths
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• #### Area and Perimeter of Rectangles - Problem 1

##### Math›Pre-Algebra›Introductory Geometry
Finding the area and perimeter of parallelograms with integer side lengths
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• #### Area and Perimeter of Rectangles - Problem 2

##### Math›Pre-Algebra›Introductory Geometry
Finding decimal approximations and exact areas and perimeters for parallelograms with square root side lengths
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• #### Approximating Area Using Rectangles - Problem 3

##### Math›Calculus›The Definite Integral
How to estimate the area between a curve and the x-axis with left- and right-hand sums.
• #### Approximating Area Using Rectangles - Problem 1

##### Math›Calculus›The Definite Integral
How to estimate the area between a curve and the x-axis with left- and right-hand sums.
• #### Approximating Area Using Rectangles - Problem 2

##### Math›Calculus›The Definite Integral
How to estimate the area under a curve, f = x^2 +1, with left- and right-hand sums.
• #### Area and Perimeter of Rectangles - Problem 4

##### Math›Pre-Algebra›Introductory Geometry
Finding possible dimensions for a rectangular fence with known perimeter
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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 Triangles - Concept

##### Math›Geometry›Area
How to derive the area of a triangle formula using the rectangle area formula.
• #### Area of Parallelograms - Problem 4

##### Math›Geometry›Area
How to find the area of a rectangle, given the perimeter and one side.
• #### 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 Parallelograms - Problem 2

##### Math›Geometry›Area
How to find the base length of a parallelogram given the area.
• #### Area of Parallelograms - Problem 1

##### Math›Geometry›Area
How to calculate the area of a parallelogram, given the lengths of the sides and a height.
• #### Area of Triangles - Problem 2

##### Math›Geometry›Area
How to find an unknown variable, x, when the area is given and the base and height of a triangle is given in terms of x.
• #### Area of Triangles - Problem 1

##### Math›Geometry›Area
How to find the height of a triangle, given the three sides of a right triangle, using the area of a triangle formula.
• #### Solving Formulas - Concept

##### Math›Geometry›Area
How to strategize about solving formulas for variables; how to solve the area of a rectangle formula for base and height; how to solve the area of a triangle formula for base and for height.
• #### Area of Trapezoids - Concept

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

##### Math›Geometry›Area
How to find the height of a parallelogram given two base lengths and a different height.