Exploring Dilations in Geometry

The video tutorial covers the concept of dilations, explaining their real-world applications such as maps and blueprints. It introduces the idea of a scale factor, which determines how much a shape is enlarged or reduced. The tutorial demonstrates how to apply dilations on a coordinate plane and provides examples of both enlargement and reduction using scale factors. It also guides viewers on identifying scale factors from given images, emphasizing the mathematical process involved.

What real-world example is similar to a dilation?

• Reading a book

• Using a map with a legend and scale

• Playing a video game

• Listening to music

Tags

CCSS.8.G.A.3

What does a scale factor determine in a dilation?

• The color of the object

• The texture of the object

• The weight of the object

• The size change of the object

Tags

CCSS.8.G.A.3

If a shape is enlarged with a scale factor of 3, how much larger is it compared to the original?

• 2 times larger

• 3 times larger

• 4 times larger

• 5 times larger

Tags

CCSS.8.G.A.3

What does a scale factor greater than 1 indicate in a dilation?

• Rotation

• Enlargement

• Reduction

• No change

Tags

CCSS.8.G.A.3

How do you apply a scale factor of 2 to a point with coordinates (3, 4)?

• (6, 8)

• (5, 6)

• (9, 12)

• (3, 4)

Tags

CCSS.7.G.A.1

How do you find the new coordinates after applying a scale factor?

• Divide each coordinate by the scale factor

• Add the scale factor to each coordinate

• Multiply each coordinate by the scale factor

• Subtract the scale factor from each coordinate

Tags

CCSS.8.G.A.3

What is the result of applying a scale factor of 1/2 to a coordinate point (8, 10)?

• (2, 2.5)

• (8, 10)

• (16, 20)

• (4, 5)

Tags

CCSS.8.G.A.3

What scale factor is used if an object's size is reduced to a third of its original size?

• 1/2

• 2/3

• 3

• 1/3

Tags

CCSS.7.G.A.1

If the original coordinates of a point are (6, 0) and the new coordinates are (2, 0), what was the scale factor?

• 2

• 1/3

• 1/2

• 3

Tags

CCSS.8.G.A.3

What is the purpose of identifying a scale factor in dilations?

• To measure the weight change

• To calculate the size change

• To determine the color change

• To understand the texture change

Tags

CCSS.8.G.A.3