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Splash Screen. Five-Minute Check (over Lesson 11–1) Main Idea Key Concept: Area of a Triangle Example 1: Find the Area of a Triangle Key Concept: Area of a Trapezoid Example 2: Find the Area of a Trapezoid Example 3: Real-World Example. Lesson Menu.

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  1. Splash Screen

  2. Five-Minute Check (over Lesson 11–1) Main Idea Key Concept: Area of a Triangle Example 1: Find the Area of a Triangle Key Concept: Area of a Trapezoid Example 2: Find the Area of a Trapezoid Example 3: Real-World Example Lesson Menu

  3. Find the areas of triangles and trapezoids. Main Idea/Vocabulary

  4. KC 1

  5. Find the Area of a Triangle Find the area of the triangle below. Estimate A = 14.4 Multiply. Example 1

  6. Find the Area of a Triangle Answer: The area of the triangle is 14.4 square centimeters. Example 1

  7. A B C D Find the area of the triangle to the right. A. 10.5 ft2 B. 13.5 ft2 C. 21.75 ft2 D. 27 ft2 Example 1

  8. Interactive Lab:Area of Trapezoids KC 2

  9. Find the Area of a Trapezoid Find the area of the trapezoid below. The bases are 4 meters and 7.6 meters. The height is 3 meters. Example 2

  10. Find the Area of a Trapezoid Replace h with 3, b1 with 4, and b2 with 7.6. Answer: The area of the trapezoid is 17.4 square meters. Example 2

  11. A B C D Find the area of the trapezoid to the right. A. 26.5 cm2 B. 60.5 cm2 C. 61.5 cm2 D. 73.5 cm2 Example 2

  12. GEOGRAPHYThe shape of the state of Montana resembles a trapezoid. Find the approximate area of Montana. Example 3

  13. Replace h with 285, b1 with 542, and b2 with 479. Answer: The area of Montana is about 145,493 square miles. Example 3

  14. A B C D PAINTING The diagram is of a canvas resembling a trapezoid that will be painted. In order to determine how much paint will be needed, estimate the area of the canvas in square feet. A. 75 ft2 B. 150 ft2 C. 300 ft2 D. 450 ft2 Example 3

  15. End of the Lesson End of the Lesson

  16. Five-Minute Check (over Lesson 11–1) Image Bank Math Tools Area of Trapezoids Drawing 3-D Figures Area of Polygons Resources

  17. A B C D (over Lesson 11-1) Find the area of the parallelogram. Round to the nearest tenth if necessary. A. 209 in2 B. 198 in2 C. 99 in2 D. 60 in2 Five Minute Check 1

  18. A B C D (over Lesson 11-1) Find the area of the parallelogram. Round to the nearest tenth if necessary. A. 19 yd2 B. 38 yd2 C. 42 yd2 D. 84 yd2 Five Minute Check 2

  19. A B (over Lesson 11-1) Determine whether the following statement is trueor false. The height of a parallelogram is the distance from the base to the opposite side. A. true B. false Five Minute Check 3

  20. A B C D (over Lesson 11-1) What is the height of a parallelogram if the base is 24 centimeters and the area is 744 square centimeters? A. 28 cm B. 32 cm C. 31 cm D. 30.5 cm Five Minute Check 4

  21. End of Custom Shows

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