A rectangle is a four-sided polygon with both pairs of opposite sides being equal in length and each interior angle being a right angle (90 degrees).

**Four sides:**A rectangle has four sides.**Opposite sides:**The opposite sides of a rectangle are equal in length.**Angles:**Each interior angle of a rectangle measures 90 degrees.**Diagonals:**The diagonals of a rectangle are equal in length and bisect each other.**Area:**The area of a rectangle can be found using the formula:*Area = length x width*.**Perimeter:**The perimeter of a rectangle can be found using the formula:*Perimeter = 2 x (length + width)*.

When studying rectangles, it's important to understand the following concepts:

- Identifying the characteristics of a rectangle (four sides, opposite sides equal, all angles 90 degrees).
- Calculating the length, width, perimeter, and area of a rectangle using formulas.
- Understanding the properties of diagonals in a rectangle.
- Solving word problems involving rectangles and their properties.

Practice drawing and identifying rectangles, as well as solving problems involving rectangles. Understand the relationship between the length, width, area, and perimeter of a rectangle.

Remember, a rectangle is a special type of quadrilateral with specific properties that distinguish it from other shapes.

Study GuidePerimeter Activity LessonPerimeter Activity LessonPolygon Perimeter Activity LessonAmazing Areas Worksheet/Answer key

Perimeter Worksheet/Answer key

Perimeter Worksheet/Answer key

Perimeter Worksheet/Answer keyDot to Dot Worksheet/Answer keyTriangle Inequality Theorem Worksheet/Answer keyPark Perimeter Worksheet/Answer keyPolygon Perimeters Vocabulary/Answer keyPerimeter

Geometry (NCTM)

Analyze characteristics and properties of two- and three-dimensional geometric shapes and develop mathematical arguments about geometric relationships.

Identify, compare, and analyze attributes of two- and three-dimensional shapes and develop vocabulary to describe the attributes.

Use visualization, spatial reasoning, and geometric modeling to solve problems.

Use geometric models to solve problems in other areas of mathematics, such as number and measurement.