8th Grade Math Chapter 10 Review Challenge

This video provides a quick review of Chapter 10, focusing on dilations. It includes practice problems to identify reductions and enlargements, calculate scale factors, and graph dilated images. The video also covers writing algebraic rules for transformations and reviews similar figures resulting from dilations. Students are encouraged to revisit Chapter 9 notes for translations, reflections, and rotations, as these concepts will appear in the Unit 4 assessment.

What is the primary focus of Chapter 10?

• Reflections

• Dilations

• Rotations

• Translations

What should you use to determine if a transformation is a reduction or an enlargement?

• Coordinates only

• Side lengths only

• None of the above

• Either coordinates or side lengths

How do you calculate the scale factor using side lengths?

• Old over new

• Add both lengths

• New over old

• Subtract smaller from larger

What is the scale factor when the side length changes from 10 to 6?

• 2/3

• 1/2

• 5/6

• 3/5

What algebraic rule represents a dilation with a scale factor of 1.5?

• 0.5 * x, 0.5 * y

• 2 * x, 2 * y

• 1 * x, 1 * y

• 1.5 * x, 1.5 * y

Which transformation sequence correctly describes a scale factor of one-half followed by a reflection across the y-axis?

• Sequence D

• Sequence B

• Sequence A

• Sequence C

What is the correct scale factor if a figure is getting larger from its original size?

• Equal to 0

• Equal to 1

• Greater than 1

• Less than 1

What happens to the angles in a similar figure after a dilation?

• They remain the same

• They increase

• They become zero

• They decrease

If a side length 'WX' is originally 3 and the scale factor is 2, what is the new length 'W' prime 'X' prime?

• 1.5

• 3

• 6

• 9

Which transformation would move the top left point 'E' to the bottom right position 'E' prime?

• Reflection

• Translation

• Dilation

• Rotation