Calculating Areas of Composite Rectangles

In this video, Mr. J explains how to find the area of composite figures by breaking them down into simpler shapes. He demonstrates this with two examples: one involving two rectangles and another involving two rectangles and a square. The key is to correctly identify and use the dimensions of each shape to calculate their areas and then sum them to find the total area of the composite figure.

What is the first step in finding the area of a composite figure?

• Calculate the perimeter

• Divide it into simpler shapes

• Guess the area based on experience

• Add the dimensions together

What shapes were used to simplify the first composite figure?

• Three squares

• Two rectangles

• One rectangle and one triangle

• Two circles

How do you find the area of a rectangle?

• Width minus length

• Length divided by width

• Length times width

• Length plus width

What is the total area of the first composite figure?

• 42 square inches

• 38 square inches

• 24 square inches

• 14 square inches

Can a composite figure be divided in multiple ways to find its area?

• No, there's only one correct way

• Yes, but only for triangles

• Yes, always

• Only if it's a rectangle

What shapes were identified in the second composite figure?

• Two rectangles and a square

• Two circles and a rectangle

• Three triangles

• One square and two circles

How was the missing measurement in the second figure determined?

• By guessing

• Using a ruler

• Adding given lengths

• Subtracting given lengths

What is the total area of the second composite figure?

• 16 square centimeters

• 25 square centimeters

• 35 square centimeters

• 41 square centimeters

Why is it important to choose the correct measurements when calculating area?

• To ensure accuracy

• To make it more challenging

• To use more paper

• To impress others

What formula is used to calculate the area of rectangles and squares?

• Length times width

• Side plus side

• Base times height

• Perimeter divided by two