1 / 8

Geometry Warm-Up 1/13/11

Geometry Warm-Up 1/13/11. In a triangle, the ratio of the measures of three sides is 3:4:5, and the perimeter is 42 feet. Find the measure of the longest side of the triangle.

erol
Download Presentation

Geometry Warm-Up 1/13/11

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. Geometry Warm-Up 1/13/11 In a triangle, the ratio of the measures of three sides is 3:4:5, and the perimeter is 42 feet. Find the measure of the longest side of the triangle. A boxcar on a train has a length of 40 feet and a width of 9 feet. A scale model is made with a length of 16 inches. Find the width of the model.

  2. Sec. 7.2: Similar Polygons Geometry January 13, 2011

  3. Are the following similar? Similar – same shape but different size

  4. Similar Polygons A ABCD ~ GEFH • Polygons are similar when • Their corresponding angles are congruent • Their corresponding sides are proportional D G H B C E F AB = BC = CD = AD GE EF FH GH

  5. Ex. 1: Decide whether the figures are similar. L O 10.5 4 18 M P 12 12 9 Q N

  6. Ex. 2: You have been asked to create a poster to advertise a field trip to see the Liberty Bell. You have a 3.5 inch by 5 inch photo that you want to enlarge. You want the enlargement to be 16 inches wide. How long will it be? X = 22.9 inches 5 The length of the enlargement will be about 23 inches. 3.5 Scale Factor – the ratio of the lengths of two corresponding sides of similar polygons

  7. Ex. 3:Parallelogram ABCD is similar to parallelogram GBEF. Find the value of y. Y = 19.2

  8. Homework • Page 392 (8 – 18 E; 22)

More Related