Finding Perimeter and Area of Composite Shapes

In this video, Mr. Jay explains how to find the perimeter and area of a composite L-shaped figure. The process involves identifying and calculating missing side lengths to determine the perimeter, followed by dividing the shape into simpler rectangles to calculate the area. The video provides a step-by-step guide to ensure accurate calculations and concludes with a summary of the methods used.

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

• Calculate the area of the shape

• Add the lengths of all the vertical sides

• Identify and calculate missing side lengths

• Divide the shape into simpler shapes

How do you find a missing side length if you know the total length of adjacent sides?

• Add the lengths of the known sides

• Divide the total length by the number of sides

• Multiply the known lengths

• Subtract the known length from the total length

How can missing side lengths be determined in a composite shape?

• By using given dimensions to calculate unknown sides

• By adding the lengths of all sides

• By multiplying the lengths of known sides

• By dividing the total perimeter by the number of sides

What is the perimeter of the L-shaped figure discussed in the video?

• 42 feet

• 56 feet

• 50 feet

• 98 feet

What is the first step in calculating the area of a composite shape?

• Find the perimeter of the shape

• Multiply the length by the width of the composite shape

• Calculate the length of all sides

• Break down the shape into simpler shapes

What formula is used to calculate the area of a rectangle?

• Length times width

• Length minus width

• Length plus width

• Length divided by width

What are the dimensions of rectangle A used in the area calculation?

• 7 feet by 6 feet

• 11 feet by 8 feet

• 6 feet by 4 feet

• 14 feet by 4 feet

What are the dimensions of rectangle B used in the area calculation?

• 14 feet by 4 feet

• 11 feet by 8 feet

• 7 feet by 6 feet

• 6 feet by 4 feet

Why is it not important to distinguish between length and width when calculating area?

• Because width is always longer than length

• Because the area will be the same regardless

• Because length is always equal to width

• Because only the perimeter requires length and width

What is the total area of the composite shape?

• 98 square feet

• 56 square feet

• 42 square feet

• 50 square feet