Understanding Area Calculation

In this video, Mr. J explains how to find the area of a composite figure by dividing it into simpler shapes. The figure is split into two rectangles, sections A and B. The area of section A is calculated as 12 square inches, and the area of section B is 42 square inches. By adding these areas, the total area of the composite figure is determined to be 54 square inches.

Why is it necessary to divide the figure into simpler shapes?

• To change the shape of the figure

• To increase the complexity of the problem

• To reduce the size of the figure

• To make the calculation of the area easier

Tags

CCSS.4.MD.A.3

CCSS.3.MD.C.7B

What is the area of Section A if it is a 4 by 3 rectangle?

• 9 square inches

• 7 square inches

• 12 square inches

• 15 square inches

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CCSS.4.MD.A.3

CCSS.3.MD.C.7B

How do you calculate the area of a rectangle?

• Subtract the width from the length

• Divide the length by the width

• Multiply the length by the width

• Add the length and width

Tags

CCSS.4.MD.A.3

CCSS.3.MD.C.7B

What is the area of Section B if it is a 14 by 3 rectangle?

• 42 square inches

• 28 square inches

• 36 square inches

• 45 square inches

What is the total area of the composite figure?

• 48 square inches

• 60 square inches

• 50 square inches

• 54 square inches