Exploring Scale Drawing and Area Concepts

The video tutorial covers solving area problems using scale and proportions. It begins with practice problem 3, where the scale of a floor plan is used to find the actual area of a bedroom. The teacher explains how to convert measurements using a scale of 1 inch to 12 feet and calculate the area of a rectangle. In practice problem 4, the focus shifts to reducing the size of a rectangle using a scale factor of one-half, demonstrating how to adjust dimensions and find the new area. The tutorial emphasizes understanding scale, proportions, and area calculations.

What is the scale given for Eva's new house floor plan?

• 1 inch to 15 feet

• 1 inch to 20 feet

• 1 inch to 12 feet

• 1 inch to 10 feet

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CCSS.7.G.A.1

If Eva's bedroom is 3/4 inches by 7/8 inches on the floor plan, what is the actual length of her bedroom?

• 9 feet

• 10 feet

• 12 feet

• 10.5 feet

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CCSS.5.NF.B.6

What is the actual width of Eva's bedroom?

• 7 feet

• 8 feet

• 9 feet

• 10 feet

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CCSS.2.MD.A.3

How do you find the area of a rectangle?

• Multiply the length and width

• Add the length and width

• Divide the length by the width

• Subtract the width from the length

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CCSS.3.MD.C.7B

CCSS.4.MD.A.3

What is the actual area of Eva's bedroom?

• 90.5 square feet

• 84.5 square feet

• 94.5 square feet

• 100.5 square feet

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CCSS.3.MD.C.7B

CCSS.4.MD.A.3

What is the scale factor used in practice problem four?

• 3/4

• 1/4

• 1/2

• 1

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CCSS.7.G.A.1

What is the new length of the rectangle after applying the scale factor?

• 1.75 cm

• 2.5 cm

• 1.5 cm

• 2 cm

Tags

CCSS.7.G.A.1

What is the new width of the rectangle after applying the scale factor?

• 1.5 cm

• 1 cm

• 2 cm

• 0.5 cm

Tags

CCSS.7.G.A.1

How do you find the area of the new rectangle?

• Multiply the new length and width

• Add the new length and width

• Subtract the new width from the new length

• Divide the new length by the new width

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CCSS.3.MD.C.7B

CCSS.4.MD.A.3

What is the area of the new rectangle after applying the scale factor?

• 2 square cm

• 1.75 square cm

• 1.5 square cm

• 1.25 square cm

Tags

CCSS.7.G.A.1