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Tuesday, February 7th

Tuesday, February 7th. Warm-Up. Please complete warm-up Take out homework (WB 10-1). Find the Area each figure 1. 2. 15 cm. 7.6 mm. 3.5 cm. Corny Joke of the Day a tribute to Tanner to week. What is invisible and smells like Bananas? “A monkeys burb”. Measurement Retest.

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Tuesday, February 7th

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  1. Tuesday, February 7th Warm-Up Please complete warm-up Take out homework (WB 10-1) Find the Area each figure 1. 2. 15 cm 7.6 mm 3.5 cm

  2. Corny Joke of the Daya tribute to Tanner to week What is invisible and smells like Bananas? “A monkeys burb”

  3. Measurement Retest Reteach: WEDNESDAY Retest: FRIDAY

  4. Homework Answers Can you find my mistakes?

  5. Ms. Evan’s Answers • About 16 ft² • About 49 m² • 63 yd² • 96 mi² • 10.5 in² • 488 ft² • 100 ft² • 26 in² • 260 ft²

  6. Which Area formula matches the shape? 1. a=s² 2. a=bh 2. a=lw

  7. Flashcard Make one flashcards: • Area of a Parallelogram a=bh A=Base x Height

  8. Height Base Describe how finding the area of the parallelogram is like finding the area of a rectangle.

  9. Why does this work?

  10. Triangle Investigation

  11. Complete the Table and DISCOVER the rule #3 #2 #1 14 m 4.5 cm 3 m 8 cm

  12. You can divide any parallelogram into two congruent triangles. So the area of each triangle is half the area of the parallelogram. Height Height Base Base Why Does This Work?

  13. FORMULA AREAOF A TRIANGLE The area A of a triangle is half the product of its base band its heighth. 1 2 bh A = h b

  14. Helpful Hints • Formula can be written as: • The base and the height must form right angles!

  15. Stop, Drop, and Watch Find the area of the triangle. 1 2 bh A = Write the formula. 1 2 Substitute 20for b and 12for h. (20· 12) A = 1 2 Multiply. (240) A = A = 120 The area is 120 ft2.

  16. #1 Let’s Try Together! Find the area of the triangle. 1 2 bh A = Write the formula. 1 2 Substitute 30for b and 24for h. (30· 24) A = 1 2 Multiply. (720) A = A = 360 The area is 360 in2.

  17. #2 You Try! Find the area of the triangle. 1 2 bh A = Write the formula. 1 2 Substitute 5for b and 8for h. (5· 8) A = 8 in. 1 2 5 in. Multiply. (40) A = A = 20 The area is 20 in2.

  18. 1 2 Substitute 4 for b and 24for h. (4 • 24) A = 1 2 1 1 2 2 #3 You Try! Find the area of the triangle. 1 2 bh A = Write the formula. 24 ft 1 2 Multiply. (108) A = A = 54 4 ft The area is 54 in2.

  19. #4-5 Group Practice #4 #5

  20. Practice Problems Practicing is how I won the superbowl!

  21. 3-2-1 Summary • 3 things you learned about Areas so far • 2 things that you need more practice on • 1 thing you really like

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