1 / 22

Bellwork

Clickers. Bellwork. Korczak Ziolkowski created a 1/34 th size sculpture Crazy Horse from which to take measurements for his mountain sculpture. If the side area of his sculpture is 312 ft 2 , what will the area of the mountain sculpture be?

neith
Download Presentation

Bellwork

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. Clickers Bellwork Korczak Ziolkowski created a 1/34th size sculpture Crazy Horse from which to take measurements for his mountain sculpture. If the side area of his sculpture is 312 ft2, what will the area of the mountain sculpture be? Gutzon Borglum created a similar sculpture whose side area 1/12. If the area of the mountain sculpture, Mt. Rushmore, is approximately 125000 ft2. What is the side area of the smaller sculpture? What is the ratio of the side areas of the Mt. Rushmore sculpture to the Crazy Horse sculpture? 14

  2. Bellwork Korczak Ziolkowski created a 1/34th size sculpture Crazy Horse from which to take measurements for his mountain sculpture. If the side area of his sculpture is 312 ft2, what will the area of the mountain sculpture be? 14

  3. Bellwork Gutzon Borglum created a similar sculpture whose side area 1/12. If the area of the mountain sculpture is approximately 125000 ft2. What is the side area of the smaller sculpture? 14

  4. Bellwork What is the ratio of the side areas of the Mt. Rushmore sculpture to the Crazy Horse sculpture? 14

  5. Clickers Bellwork • Find the area of each object 12 u 10 u 16 u 10 u 8 u

  6. Bellwork Solution • Find the area of each object 12 u 16 u

  7. Bellwork Solution • Find the area of each object 10 u

  8. Bellwork Solution 10 u • Find the area of each object 8 u

  9. Areas of Regular Polygons Section 11.6

  10. The Concept • Today we’re going to talk about figuring the areas of regular polygons • Today’s lesson will borrow liberally from the skills that you learned during the geoboard exercises

  11. In order to correctly address the issue of calculating areas of regular polygons, a few pieces of terminology must be introduced Regular polygons can be inscribed inside a circle of radius r, thus the radius of a polygon is the distance from the center to one of the vertices Terminology The apothem is the perpendicular distance from center of the polygon to any of the sides r θ The central angle of the polygon is the angle formed by the two radii drawn by consecutive vertices, or 360/number of sides

  12. Find the central angle, radius and apothem of the polygon below 10 In use 30 Radius=30 30 a 10

  13. We can use our previous figures to figure the area of this object Area 30 29.5 10

  14. Using the previous example we see the formula take shape Formula 30 28.3 10 Where s*n=Perimeter Either formula works, it just depends on what you are given

  15. Find the area of the polygon In use 4 18

  16. Find the area of the polygon In use 10 h 5 10

  17. What is the area of the polygon show below On your Own 6.5 7

  18. What is the area of the polygon show below On your Own 12 Perimeter=70 units

  19. What is the area of the polygon show below On your Own 20

  20. Homework 11.6 12, 15, 16, 23-29, 31-33, 36

  21. What is the area of the polygon show below On your Own 8

  22. How to figure area in a regular polygon Most Important Points

More Related