Exploring Scale Drawings and Their Ratios

Mr. Buffington introduces the concept of scale drawings, explaining how images can be reduced or enlarged while maintaining their aspect ratios. He discusses the importance of proportionality and equivalent ratios in scale drawings, using examples of triangles to illustrate these concepts. The video also covers how to identify corresponding points in similar triangles and concludes with a recap of the key ideas.

What is a scale drawing?

• An image that changes shape when resized.

• An image that is only enlarged in size.

• An image that is either reduced or enlarged but maintains the same ratios.

• An image that is only reduced in size.

Tags

CCSS.7.G.A.1

What term is sometimes used interchangeably with scale images?

• Identical images

• Aspect ratio

• Similar images

• Congruent images

Tags

CCSS.7.G.A.1

When reducing an image, what remains the same?

• The color

• The orientation

• The size

• The shape

Tags

CCSS.8.G.A.3

Which of the following is an example of enlarging an image?

• Shrinking a photo to fit a frame

• Printing a smaller version of a poster

• Looking through a microscope

• Viewing a house plan on a phone

Tags

CCSS.8.G.A.3

What must be true for images on a grid to be considered proportional?

• They must be rotated the same way

• They must have the same color

• They must be the same size

• They must have equivalent ratios

Tags

CCSS.7.RP.A.2D

How can you check if two triangles on a grid are proportional?

• By comparing their perimeters

• By comparing their colors

• By comparing their heights and bases

• By comparing their angles

Tags

CCSS.8.G.A.2

CCSS.HSG.CO.B.6

What is the height of the larger triangle if the smaller triangle's height is 4?

• 12

• 10

• 8

• 6

Tags

CCSS.8.G.A.2

CCSS.HSG.CO.B.6

If the base of a smaller triangle is 3, what is the base of the larger triangle?

• 7

• 6

• 5

• 8

Tags

CCSS.8.G.A.2

CCSS.HSG.CO.B.6

What happens to the proportionality of a triangle if it is rotated?

• It changes

• It remains the same

• It becomes smaller

• It becomes larger

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

What is a key characteristic of scale images?

• They are always larger than the original

• They are the same shape but different sizes

• They are always smaller than the original

• They are the same size but different shapes

Tags

CCSS.7.G.A.1