1 / 12

Geometry

Today: 8.2 Check 8.3 Instruction 8.3 Practice. Things may come to those who wait, but only the things left by those who hustle. Abraham Lincoln. Geometry. Yesterday. Things may come to those who wait, but only the things left by those who hustle. Abraham Lincoln. Assignment:

chenoa
Download Presentation

Geometry

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Today: 8.2 Check 8.3 Instruction 8.3 Practice Things may come to those who wait, but only the things left by those who hustle. Abraham Lincoln Geometry

  2. Yesterday Things may come to those who wait, but only the things left by those who hustle. Abraham Lincoln • Assignment: • 8.2 p468 #18, 22, 31, 32, 44, 45 • Quiz 8.1-8.3 on Tuesday

  3. Homework Quiz Take out your piece of paper labeled CHAPTER 8 HOMEWORK QUIZ. Write down the date (1/11), then write out the following problem, your work and your answer. The blueprint for the new gym has a length of 8 inches and a width of 2 ½ inches. If the actual gym is 136 feet long, how wide will it be?

  4. 8.3 Similar Polygons Objectives: • Identify similar polygons • Use similar polygons in real-life Vocabulary: similar, scale factor, similarity statement

  5. Similar Polygons: 2 polygons such that their corresponding angles are congruent and the lengths of corresponding sides are proportional 6 3 8 4 3 6 Similarity and Proportionality Statement:ΔTOM ~ ΔNOJ

  6. Scale Factor: theratio of the lengths of two corresponding sides of two similar polygons 1.5 2.5 Scale factor: 3/5 or 3:5 6 10

  7. Are the figures similar? If so, write a similarity statement and state the scale factor. S B 4 6 40° 16 A 12 R 80° 3 60° 40° 8 C T

  8. If WXYZ ~ LMNO and the scale factor is 3:2, find the perimeter of WXYZ. X W 10 L M 4 4 4 O 10 N Z Y

  9. Photo Application You have a photo 4 inches by 6 inches long that you want to reduce to fit in a frame that is 1.5 inches wide. How long will the reduced photo be?

  10. Painting Application A painting is similar to the wall on which it is hanging. Calculate the scale factor of the wall to the painting, and then find the ratio of their perimeters. painting 8 ft 3.2ft 6 ft 15 ft

  11. Scale Factor in Real Life Meghan’s room is a perfect cube and each wall has an area of 64 ft2. If she has a dollhouse that has a perfect cube room and the area of a wall is 36 in2, what is the ratio from real house to dollhouse?

  12. Assignment: 8.3 p 477#24-30, 40, 42, 43, 44 Quiz 8.1-8.3 on Tuesday Geometry Things may come to those who wait, but only the things left by those who hustle. Abraham Lincoln

More Related