1. Bellwork Find the area of the triangle below.

2. 11.3 Area of Trapezoids Students will be able to find the area of trapezoids given information regarding the height, bases and/or median.

3. Discover With your partner, follow the directions on the sheet you’ve been given. One/partner.

4. Trapezoid b1b1 b2b2 h > >

5. Area of a Trapezoid Theorem: The area A of a trapezoid whose bases have lengths b 1 and b 2 and whose altitude has length h is given by

6. Median (Defn) The median of a trapezoid is the segment that connects the ____________ of the legs of the trapezoid. The median can be found by finding the _____________ of the bases.

7. Trapezoid Area formula (2)

8. Chapter 11 Toolbox Fill in all the formulas we’ve talked about so far in Chapter 11. You will be expected to know these and will not be given a formula sheet.

9. Group work In your groups, complete the 5 problems. I will randomly select 5 people from each group to draw and present each problem. Be sure you are ready! When finished, start your homework!

10. Example 1 Find the area of the isosceles trapezoid.

11. Example 2 Find the area of a trapezoid if its height is 5 inches and the median of the trapezoid is 12 inches.

12. Example 3 Find the area of the trapezoid below.

13. Example 4 Find the shorter base of a trapezoid if the area is 52 square meters, its altitude is 8 meters and its longer base is 10 meters.

14. Example 5 The consecutive sides of an isosceles trapezoid are in the ratio 2:5:10:5, and the trapezoid’s perimeter is 44. Find the area of the trapezoid.

15. Homework Pg. 525 # 2, 3,4, 7b, 8a, 9, 10, 12 Extra Credit #17 Quiz over 11.1-11.4 Wednesday

16. Example 6 Find the area of this figure. A. 24 B. 92 C. 99 D. 68 11.4