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Dilation and Scale Factors in Geometry

Dilation and Scale Factors in Geometry

Assessment

Interactive Video

Mathematics

6th - 7th Grade

Practice Problem

Hard

Created by

Thomas White

FREE Resource

This lesson reviews the use of circular grids in geometry, focusing on the center of dilation and scale factors. It explains how points and images move on a circular grid, using various scale factors to demonstrate dilation. The lesson includes examples with different scale factors, such as two, two and a half, and three and a half, to illustrate how images are scaled. It also covers the dilation of triangles, showing how each point moves based on the scale factor. The lesson concludes with a summary of using circular grids, scale factors, and the center of dilation.

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10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the center of dilation in a circular grid?

The innermost circle

The midpoint of any line segment

The center point of the grid

The outermost circle

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

If a point is moved double the distance from the center, what is the scale factor?

1

2

3

4

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How many units does a point move if the scale factor is two and a half?

4

2

5

6

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the scale factor if a point moves three and a half times its original distance?

2.5

3

3.5

4

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In the context of dilation, what does a scale factor of 3.5 mean?

The image is enlarged by 3.5 times

The image is reduced by 3.5 times

The image is unchanged

The image is reduced to half its size

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

When dilating a triangle, how are the points moved?

Randomly

Along the same ray from the center

In a circular motion

Towards the center

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

If point A is 3 units from the center and the scale factor is 2, how far is A'?

3 units

4 units

5 units

6 units

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