Download presentation

Presentation is loading. Please wait.

Published byJaylin Converse Modified over 3 years ago

1
Do Now 1/11/12 Take out your HW from last night. Text p. 166, #1-19 all, 23 &24 Text p. 166, #1-19 all, 23 &24 Copy HW in your planner. Text p. 170, #1-11 all, 14-16 all Text p. 170, #1-11 all, 14-16 all In your journal, tell whether the figures are similar. 59° 35° 86° 119° 55° 107° 79° 107° 80° 135° 38°

2
Try it out Tell whether the figures are similar. 59° 35° 86° 119° 55° 107° 79° 107° 80° 135° 38° NP QS = ? NO QR = ? PO RS 7 14 4848 6 12 1212 1212 1212 = ? = ? = ? = ? Similar Not similar; corresponding angles do not have equal measures

3
Homework Text p. 166, #1-19 all, 23 &24 1) similar 2) not similar 3) similar 4) not similar 5) not similar 6) similar 7) similar 8) not similar 9) No, corresponding angles are not equal 10) 4 in. X 6 in., 16 in. X 24 in. 11) similar 12) not similar 13) yes 14) no 15) yes 16) yes 17) no 18) no 19) no 23) C 24) No

4
Objective SWBAT use similar figures to find unknown measures

5
Section 4.4 “Similar Figures” Similar Figures Two figures are SIMILAR FIGURES if they have the same shape but not necessarily the same size. The symbol ~ indicates two figures are similar. Two figures are similar if: 1). The measures of their corresponding angles are equal 2). The ratios of the lengths of their corresponding sides are proportional (equal ratios)

6
Crossmultiply Section 4.5 “Using Similar Figures” Given ABC ~ JKL, find x and y. Angle B corresponds to Angle K y = 103°

7
Given ABCD ~ GHIJ, find HJ. G H IJ AB CD 30 12 x 16 Cross multiply

8
C A B b a 32 32 F D E 20 20 35 40 Given ABC ~ DEF, find a. Given ABC ~ DEF, find b.

9
C A B Y Z X 20 20 g 25 25 24 24 40 40 f Given ABC ~ XYZ, find g and f.

10
Indirect Measurement the method of using proportions to find an unknown length or distance in similar figures

11
Indirect Measurements You measure the shadow of a telephone pole to be 24 ft. The shadow of a 5ft-tree is 4 ft. How tall is the telephone pole? S H s h

12
Indirect Measurements To estimate the height of the Transco Tower in Houston, TX, you measure its shadow to be about 55m. The shadow of a 50m flagpole is about 10m. Estimate the height of the Transco Tower. S H s h

13
City officials want to know the height of a traffic light. Estimate the height of the traffic light. 27.25 15 = 48.75 h Write a proportion. 27.25h = 731.25 The traffic light is about 27 feet tall. 27.25 ft 48.75 ft h ft Cross multiply. h ≈ 27 ftDivide each side by 27.25 to isolate the variable. Indirect Measurements

14
Homework NJASK7 Prep Text p. 170, #1-11 all, 14-16 all Text p. 170, #1-11 all, 14-16 all

Similar presentations

OK

5-8 Using Similar Figures Do Now Test Friday on chapter5 section 1-8

5-8 Using Similar Figures Do Now Test Friday on chapter5 section 1-8

© 2018 SlidePlayer.com Inc.

All rights reserved.

To ensure the functioning of the site, we use **cookies**. We share information about your activities on the site with our partners and Google partners: social networks and companies engaged in advertising and web analytics. For more information, see the Privacy Policy and Google Privacy & Terms.
Your consent to our cookies if you continue to use this website.

Ads by Google

Ppt on palliative care pain management end of life care Ppt on unit and non unit fractions Ppt on railway track geometry Ppt on solar energy in india Ppt on coalition government wwi 3d holographic display ppt online Ppt on airbag working principle Ppt on eisenmenger syndrome lungs Ppt on group development forming Ppt on national heritage of india