1. Home
  2. >5th Grade Math
  3. >Polygons
Help

Area and perimeter of rectangles

Everything You Need in One Place

Homework problems? Exam preparation? Trying to grasp a concept or just brushing up the basics? Our extensive help & practice library have got you covered.

Learn and Practice With Ease

Our proven video lessons ease you through problems quickly, and you get tonnes of friendly practice on questions that trip students up on tests and finals.

Instant and Unlimited Help

Our personalized learning platform enables you to instantly find the exact walkthrough to your specific type of question. Activate unlimited help now!

0/3
?
Intros
Lessons
  1. Introduction to Area and Perimeter of Rectangles:
  2. What are the basic properties of a rectangle?
  3. How do you calculate the perimeter of a rectangle?
  4. How do you calculate the area of a rectangle?
0/13
?
Examples
Lessons
  1. Perimeter of Rectangles
    Calculate the perimeter of each rectangle or square.

    1. 2D Shapes: Area and Perimeter of Rectangles

    2. 2D Shapes: Area and Perimeter of Rectangles

    3. 2D Shapes: Area and Perimeter of Rectangles

    4. 2D Shapes: Area and Perimeter of Rectangles
  2. Area of Rectangles
    Calculate the area of each rectangle or square.

    1. 2D Shapes: Area and Perimeter of Rectangles

    2. 2D Shapes: Area and Perimeter of Rectangles

    3. 2D Shapes: Area and Perimeter of Rectangles

    4. 2D Shapes: Area and Perimeter of Rectangles
  3. Perimeter and Area of Compound Rectangles
    Calculate the perimeter and area of each compound shape. Break down the complex shapes into components (rectangles) first!

    1. 2D Shapes: Area and Perimeter of Rectangles

    2. 2D Shapes: Area and Perimeter of Rectangles

    3. 2D Shapes: Area and Perimeter of Rectangles
  4. Rectangles Word Problem - 1
    Pizza boxes are usually square. If a pizza box has a perimeter of 61 inches, what does it measure on each side?
    1. Rectangles Word Problem - 2
      A book's cover has a perimeter of 36 inches. The longer side is 10 inches. What is the area of the book cover?
      Topic Notes
      ?

      In this lesson, we will learn:

      • The basic properties of the shape of the rectangle
      • How to understand and calculate the perimeter of a rectangle
      • How to understand and calculate the area of a rectangle

      Notes:

      • A rectangle is a 2D (two-dimensional) shape with 4 straight sides and 4 right angles (90°)
        • Each pair of sides (across from each other) are the exact same length

      2D Shapes: Area and Perimeter of Rectangles

        • A square is a special type of rectangle where all side lengths are the same

      2D Shapes: Area and Perimeter of Rectangles

      • The perimeter is the exact distance around the shape.
        • Perimeter is a 1D (one-dimensional) quantity
          • It uses units such as meters (m, cm, mm, km), miles (mi), yards (yd), or inches and feet (in and ft)

        • For rectangles, the formula is written as:
          • Prectangle = (2 × l)+(2 × w)(2 \, \times \, l) + (2 \, \times \, w)
            • Where ll is length, and w is width

        • For squares, the formula is written as:
          • Prectangle = 4 × s4 \, \times \, s
            • Where ss is side length

      • The area is the space that is covered by the shape.
        • Area is a 2D (two-dimensional) quantity
          • It uses squared units such as square meters (m2, cm2, mm2, km2), square miles (mi2), square yards (yd2), or square inches and feet (in2 and ft2)

        • For rectangles, the formula is written as:
          • Arectangle = l × wl \, \times \, w
            • Where ll is length, and w is width

        • For squares, the formula is written as:
          • Asquare = s × s = S2s \, \times \, s \, = \, S^{2}
            • Where ss is side length