Download presentation

Presentation is loading. Please wait.

Published byIsaias Maulden Modified over 3 years ago

2
Adapted from Walch Education Investigating Scale Factors

3
Key Concepts 1.1.2: Investigating Scale Factors 2 The notation is as follows: D k (x, y) = (kx, ky). Multiply each coordinate of the figure by the scale factor when the center is at (0, 0).

4
Concepts, continued… 1.1.2: Investigating Scale Factors 3 The lengths of each side in a figure also are multiplied by the scale factor. If you know the lengths of the preimage figure and the scale factor, you can calculate the lengths of the image by multiplying the preimage lengths by the scale factor. The dilation is an enlargement if k > 1, a reduction if 0 < k < 1, and a congruency transformation if k = 1.

5
Let’s Practice 1.1.2: Investigating Scale Factors 4 A triangle has vertices G (2, –3), H (–6, 2), and J (0, 4). If the triangle is dilated by a scale factor of 0.5 through center C (0, 0), what are the image vertices? Draw the preimage and image on the coordinate plane.

6
Step 1 1.1.2: Investigating Scale Factors 5 Start with one vertex and multiply each coordinate by the scale factor, k. D k = (kx, ky)

7
Step 2 1.1.2: Investigating Scale Factors 6 Repeat the process with another vertex. Multiply each coordinate of the vertex by the scale factor.

8
Step 3 1.1.2: Investigating Scale Factors 7 Repeat the process for the last vertex. Multiply each coordinate of the vertex by the scale factor.

9
Step 4 1.1.2: Investigating Scale Factors 8 List the image vertices.

10
Step 5 1.1.2: Investigating Scale Factors 9 Draw the preimage and image on the coordinate plane.

11
Your turn. 1.1.2: Investigating Scale Factors 10 What are the side lengths of with a scale factor of 2.5 given the preimage and image to the right and the information that DE = 1, EF = 9.2, and FD = 8.6?

12
Thanks for watching! Ms. Dambreville

Similar presentations

OK

EXAMPLE 1 Identify dilations Find the scale factor of the dilation. Then tell whether the dilation is a reduction or an enlargement. a. SOLUTION a. Because.

EXAMPLE 1 Identify dilations Find the scale factor of the dilation. Then tell whether the dilation is a reduction or an enlargement. a. SOLUTION a. Because.

© 2017 SlidePlayer.com Inc.

All rights reserved.

Ads by Google

Ppt on product advertising photography Moral stories for kids ppt on batteries Female reproductive system anatomy and physiology ppt on cells Download free ppt on solar system Ppt on general election 2014 Ppt on rain technology in computer science Ppt on water pollution in the world Ppt on bond length of hbr Ppt on noun in hindi language Ppt on new zealand culture and tradition