1 / 9

Happy Monday!

Happy Monday!. You need to have out your note cards: colored #2, 27, 28, & 36 (area of a regular polygon) and white #29 (apothem) And page 30 - your homework from Friday. Some problems to get your mind working!. Piece (P’s) of Pumpkin pie. Blanket. Made in China.

fia
Download Presentation

Happy Monday!

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. Happy Monday! You need to have out your note cards: colored #2, 27, 28, & 36 (area of a regular polygon) and white #29 (apothem) And page 30 - your homework from Friday.

  2. Some problems to get your mind working! Piece (P’s) of Pumpkin pie Blanket Made in China What do these really say? On cloud nine Tennis shoe No one to blame update Down to earth Repeat after me

  3. Quick review from Friday: 1. What is an apothem? A segment drawn from the center of a regular polygon that is perpendicular to a side and bisects the side. opossum

  4. What is the formula for finding the area of a REGULAR • polygon? Area = ½ P a P = perimeter of REGULAR polygon a = apothem • Homework check (p. 30) - just check your own paper. • 5. 1038 6. 990 7. 400.4 • 8. 187.2 9. 13080 10. 974.1

  5. What about this problem? Do you have enough information to find the area of this REGULAR hexagon? a² + 13.85² = 16² a²  64.2 a  8 apothem 16 13.85 A = ½ • 96 • 13.85 A  664.8 HINT: His theorem might help! 8 8

  6. Find the area of this regular polygon. Do you have enough information? Area = ½ Pa 36° 10 10

  7. Okay, so the perimeter is easy to find. It’s 100. He should try some trigonometry! Trigonometry – that might work! You tell him! I don’t know what the apothem is, how can I find the area?

  8. Find the area of this regular polygon. tan 36 = 10 1 a Area = ½ Pa = ½ • 100 • 13.8 = 690 a = 13.8 36° a 10 10

  9. area of a regular polygon = 1/2 • perimeter • apothem Your turn! Finish p. 30!

More Related