• #### 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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• #### Rectangle and Square Properties - Concept

##### Math›Geometry›Polygons
How to define a rectangle and a square.
• #### Rectangle and Square Properties - Problem 2

##### Math›Geometry›Polygons
How to find the point of intersection of the diagonals of a rectangle in a coordinate plane.
• #### 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 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 4

##### Math›Pre-Algebra›Introductory Geometry
Finding possible dimensions for a rectangular fence with known perimeter
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• #### 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 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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• #### Rectangle and Square Properties - Problem 1

##### Math›Geometry›Polygons
How to find the angles in a square created by drawing diagonals, and finding the lengths of those diagonals.
• #### 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 2

##### Math›Calculus›The Definite Integral
How to estimate the area under a curve, f = x^2 +1, 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.
• #### Area of Parallelograms - Concept

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

##### Math›Geometry›Geometry Building Blocks
How to define perimeter and calculate it for squares, rectangles, and circles.
• #### Area of Parallelograms - Problem 4

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

##### Math›Geometry›Area
How to derive the area of a triangle formula using the rectangle area formula.
• #### Rhombus Properties - Concept

##### Math›Geometry›Polygons
How to define a rhombus and compare it to a square and rectangle.
• #### Perimeter - Problem 1

##### Math›Geometry›Geometry Building Blocks
How to calculate the side length of a rectangle given the perimeter and a different side.
• #### 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.
• #### Using the Pythagorean Theorem to find a Missing Hypotenuse - Problem 2

##### Math›Trigonometry›Pythagorean Theorem
How to calculate the length of a diagonal in a rectangle given its side lengths.