Composite Shapes and Their Properties

This video tutorial explains how to calculate the area and perimeter of composite shapes. It begins with an introduction to composite shapes, followed by two examples. In each example, the perimeter is calculated by summing the lengths of all sides. The area is determined by dividing the composite shape into basic shapes, specifically rectangles, and using the formula for the area of a rectangle. The video emphasizes ensuring all side lengths are accounted for in calculations.

What is a composite shape?

• A shape that is always a rectangle

• A shape made of two or more basic shapes

• A shape made of only circles

• A shape with no sides

What is the first step in finding the perimeter of a composite shape?

• Divide the shape into smaller parts

• Subtract the smallest side from the largest

• Add all the sides

• Multiply all the sides

How many sides does the first composite shape example have?

• Seven

• Six

• Five

• Four

What is the perimeter of the first composite shape example?

• 30 cm

• 36 cm

• 40 cm

• 42 cm

What is the total perimeter of the first composite shape example?

• 34 cm

• 40 cm

• 36 cm

• 38 cm

How do you find the area of a composite shape?

• By subtracting the area of the smallest shape from the largest

• By adding the perimeters of all sides

• By dividing the shape into basic shapes and adding their areas

• By multiplying the length and width of the entire shape

What are the dimensions of shape A in the first example?

• 5 cm by 3 cm

• 8 cm by 3 cm

• 7 cm by 2 cm

• 6 cm by 4 cm

What is the area of shape A in the first example?

• 21 square cm

• 24 square cm

• 18 square cm

• 27 square cm

What is the total area of the first composite shape example?

• 34 square cm

• 40 square cm

• 36 square cm

• 38 square cm

What is the formula for the area of a rectangle?

• Length divided by width

• Length times width

• Length plus width

• Length minus width