1 / 23

# Friday, January 6, 2012 - PowerPoint PPT Presentation

Friday, January 6, 2012. No HW. Study for Ch. 7 on Wed 1/11 Warm Up – Complete #20 on back of HW – “An architect …”. An architect …. Agenda. Review of Area of Irregular Figures Review Study Guide Practice with finding area. Area of Irregular Figures. Don’t assume anything!.

I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.

## PowerPoint Slideshow about ' Friday, January 6, 2012' - callie

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.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 - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript

• No HW.

• Study for Ch. 7 on Wed 1/11

• Warm Up –

Complete #20 on

back of HW –

“An architect …”

• Review of Area of Irregular Figures

• Review Study Guide

• Practice with finding area

• Don’t assume anything!

• About 16 in2

• About 10 in2

• A = (9)(12) = 108 cm2

• A = ½ (16)(24) = 192 in2

• A = ½ (7.5)(5+10) = 56.25 m2

• A = triangle + square

= ½ (8)(12) + (12)2

= 48 + 144 = 192 cm2

7. C = 2πr = 2(3.14)(4) = 25.12 cm

A = πr2 = (3.14)(4)2 = 50.24 cm2

8. d = 2r = 25 mm

r = 12.5 mm

C = 2πr = 2(3.14)(12.5) = 78.5 mm

A = πr2 = (3.14)(12.5)2 = 490.625 mm2

### Cold Call!

How do you find the area?

Keep your study guide out!

### What is pi (π)?

• What did the scientist say to the hydrogen atom that claimed to have lost an electron?

• What happened when the TV set asked the remote control for a date?

• Answers will be posted at www.teachervivian.com