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Lesson 11-5 Pages 489-492

Lesson 11-5 Pages 489-492. Area of Triangles and Trapezoids. What you will learn!. How to find the area of triangles and trapezoids. Vocabulary. 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.

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Lesson 11-5 Pages 489-492

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  1. Lesson 11-5Pages 489-492 Area of Triangles and Trapezoids

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

  3. Vocabulary

  4. 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 A = bh÷2

  5. 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) A = (a+b)h ÷ 2

  6. Link to Pre-Made Lesson

  7. Example 1: Find the area of the triangle:

  8. A = 14.4 cm2

  9. Example 2: Find the area of the trapezoid:

  10. A = 17.4 m2

  11. Example 3: The shape of the state of Montana resembles a trapezoid. Estimate its area in square miles.

  12. Page 491 Guided Practice #’s 4-7

  13. Read: Pages 489-490 with someone at home and study examples!

  14. Homework: Page 491-492 #’s 8-15, 20-21, 23-36 Lesson Check 11-5

  15. Link to 11-5 Review Problems

  16. Page 591 Lesson 11-5

  17. b h h a

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