Identifying Scaled Copies in Geometry

The video tutorial introduces the concept of scaled copies, aiming to help students identify and describe them. It includes exercises to determine which drawings are scaled copies of an original figure, followed by an analysis of why certain drawings qualify as scaled copies while others do not. The tutorial emphasizes the importance of maintaining proportional side lengths and angles, introducing the concept of a scale factor. By the end, students should be able to recognize scaled copies and understand their characteristics.

What is one of the goals mentioned for today's lesson?

• To measure angles

• To draw new figures

• To identify scaled copies of figures

• To learn about different shapes

Tags

CCSS.8.G.A.2

CCSS.HSG.CO.B.6

Which drawings were identified as scaled copies of the original letter F?

• Drawings 5, 6, and 7

• Drawings 3, 4, and 5

• Drawings 1, 2, and 7

• Drawings 1, 2, and 3

Tags

CCSS.4.G.A.3

What is the scale factor used in drawing 1?

• 1.5

• 2

• 3

• 0.5

Tags

CCSS.7.G.A.1

Why is drawing 3 not considered a scaled copy?

• The middle bar is twice the original size

• It got taller but not wider

• It got wider but not taller

• The angles changed

Tags

CCSS.8.G.A.3

What is the main reason drawing 5 is not a scaled copy?

• The middle bar is twice the original size

• The angles changed

• It is half as big as the original

• It got wider but not taller

Tags

CCSS.8.G.A.3

Which drawing has all parts multiplied by 0.5 except the middle bar?

• Drawing 6

• Drawing 3

• Drawing 5

• Drawing 4

Tags

CCSS.7.G.A.1

Which characteristic is NOT true for scaled copies?

• The side lengths are multiplied by the same number

• The side lengths are multiplied by different numbers

• The angles are always the same

• The shape is always the same

Tags

CCSS.4.G.A.3

What is the term used for the number by which side lengths are multiplied in scaled copies?

• Multiplier

• Ratio

• Proportion

• Scale factor

Tags

CCSS.7.G.A.1

What should you be able to do by the end of the lesson?

• Identify and describe scaled copies

• Draw new figures

• Create scaled copies

• Measure angles

Tags

CCSS.7.G.A.1

What is the relationship between the side lengths of the original and scaled copies?

• They are divided by the same number

• They are multiplied by the same number

• They are subtracted by the same number

• They are added by the same number

Tags

CCSS.8.G.A.3