Loading in 5 sec....

Geometry Warm-Up1/13/11PowerPoint Presentation

Geometry Warm-Up1/13/11

- 98 Views
- Uploaded on
- Presentation posted in: General

Geometry Warm-Up1/13/11

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.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.

- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

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.

Sec. 7.2: Similar Polygons

Geometry

January 13, 2011

Similar – same shape but different size

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

L

O

10.5

4

18

M

P

12

12

9

Q

N

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

Y = 19.2

- Page 392 (8 – 18 E; 22)