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Thursday, February 16 th

Thursday, February 16 th. Warm Up. Find the Area Base: 4 Height 11 2 . Simplify. Please complete warm up and have your Homework out (Cube Views). Joke of the Day . Why did the cookie go to the doctor It was feeling “crummy”. Homework Answers. Goal for today.

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Thursday, February 16 th

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  1. Thursday, February 16th Warm Up Find the Area Base: 4 Height 11 2. Simplify Please complete warm up and have your Homework out (Cube Views)

  2. Joke of the Day Why did the cookie go to the doctor It was feeling “crummy”

  3. Homework Answers

  4. Goal for today Class: Volume and Surface Area for cubes Bulldog Pride: View Extention with cubes 

  5. Surface Area

  6. The surface area of a three-dimensional figure is the sum of the areas of its surfaces. Units squared! To help you see all the surfaces of a three-dimensional figure, you can use a net. A net is the pattern made when the surface of a three-dimensional figure is layed out flat showing each face of the figure.

  7. Rectangular Prisms Rectangular Prisms- have a total of 6 faces. We need to find the area for all 6 faces, and then add them together (remember- some faces will be congruent)

  8. Try Together! Find the surface area S of the prism. Use a net! Draw a net to help you see each face of the prism. Use the formula A = lw to find the area of each face.

  9. Add the areas of each face. Finding the Areas of each! A: A = 5  2 = 10 B: A = 12  5 = 60 C: A = 12  2 = 24 D: A = 12  5 = 60 E: A = 12  2 = 24 F: A = 5  2 = 10 S = 10 + 60 + 24 + 60 + 24 + 10 = 188 The surface area is 188 in2.

  10. #2 Let’s Label the Rectangles!

  11. Why is finding Surface Area of a cube going to be easier?

  12. Cubes Cubes-have a total of 6 faces. We need to find the area for just one face and then multiply it by 6!

  13. Try together! 7 in

  14. 1 face= 7 x 7=49 49 x 6 =

  15. VOLUME

  16. It takes 10, or 5 · 2, centimeter cubes to cover the bottom layer of this rectangular prism. There are 3 layers of 10 cubes each to fill the prism. It takes 30, or 5 · 2 · 3, cubes. Volume is expressed in cubic units, so the volume of the prism is 5 cm · 2 cm · 3 cm = 30 cm3.

  17. Rectangular Prisms and Cubes Volume v= l x w x h

  18. 13 in. 11 in. 26 in. V = lwh Write the formula. V = 26•11•13 l = 26; w = 11; h = 13 V = 3,718 in3 Multiply.

  19. Find the volume of the rectangular prism. 16 in. 12 in. 29 in. V = lwh Write the formula. V = 29•12•16 l = 29; w = 12; h = 16 V = 5,568 in3 Multiply.

  20. You Try!

  21. Homework If A is on the Bottom, determine which letter is on the top!

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