1 / 29

Lesson 10-5 Pages 520-525

Lesson 10-5 Pages 520-525. Area: Parallelograms, Triangles, and Trapezoids. Lesson Check 10-4. What you will learn!. How to find the area of parallelograms, triangles, and trapezoids. Vocabulary. What you really need to know!. HEIGHT (h). BASE (b).

milt
Download Presentation

Lesson 10-5 Pages 520-525

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. Lesson 10-5Pages 520-525 Area: Parallelograms, Triangles, and Trapezoids Lesson Check 10-4

  2. What you will learn! How to find the area of parallelograms, triangles, and trapezoids.

  3. Vocabulary

  4. What you really need to know! HEIGHT (h) BASE (b) The area A of a parallelogram equals the product of its base b and its height h. A = bh

  5. The area of a parallelogram is the same as the area of a rectangle!

  6. What you really need to know! Height (h) BASE (b) The area A of a triangle equals half the product of its base b and height h. A = ½bh

  7. The area of a triangle is the same as ½ the area of a parallelogram!

  8. What you really need to know! b h a The area A of a trapezoid equals half the product of the height h and the sum of the bases a and b. A = ½ h(a+b)

  9. The area of a trapezoid is the same as ½ the area of a parallelogram! Notice how the top layer and bottom layer of the trapezoids creates the base of the parallelogram!

  10. b h h a

  11. Example 1: Find the area of the parallelogram. A = bh A = 3 x 3 A = 9 m2

  12. Example 2: Find the area of the parallelogram. A = bh A = 6.2 x 4.3 A = 26.66 in2

  13. Example 3: Find the area of the triangle. A = ½ bh A = ½ x 3 x 4 A = 6 m2

  14. Example 4: Find the area of the triangle. A = ½ bh A = ½ x 3.9 x 6.4 A = 12.48 ft2

  15. Example 5: Find the area of the trapezoid.

  16. A = ½ h(a+b) A = ½ x 6(7 ½ + 5 ¼ ) A = 38 ¼ m2

  17. Example 6: A wall that needs to be painted is 16 feet wide and 9 feet tall. There is a doorway that is 3 feet by 8 feet and a window that is 6 feet by 5 ½ feet. What is the area to be painted?

  18. Area to be painted is: 144 – 24 – 33 = 87 ft2

  19. Page 523 Guided Practice #’s 3-6

  20. Read: Pages 520-523 with someone at home and study examples!

  21. Homework: Pages 524-525 #’s 8-22 even, 24-28, 32-43 Lesson Check 10-5

  22. Page 749 Lesson 10-5

  23. Lesson Check 10-5

More Related