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Tuesday, February 21 st Please complete warm up and write down the Homework 1.Solve the Proportion 2. Find the Surface Area.

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Presentation on theme: "Tuesday, February 21 st Please complete warm up and write down the Homework 1.Solve the Proportion 2. Find the Surface Area."— Presentation transcript:

1 Tuesday, February 21 st Please complete warm up and write down the Homework 1.Solve the Proportion 2. Find the Surface Area

2 Joke of the Day What candy is never on time? Choco-late

3 Weekly Review Answers Interims are only 2 weeks away!!!!!!!!!!

4 Goal for today Volume and Surface Area Triangular AND Rectangular PRISMS

5 Surface Area

6 How would you describe: Net Volume And Surface Area

7 Part 1: Surface Area 1.Using a Net 2.Using a Formula

8 Find the area to each shape in the net. Add the areas up to find the TOTAL AREA 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 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 = = 188 Add the areas of each face. The surface area is 188 in 2.

10

11 Remember! Area of a TRIANGLE is ½ x b x h

12 12 in 5 in 4 in

13 11 in 7 in 3 in

14 Surface Area with Formulas

15

16 #1 Try Together! SA= 2(lw)+2(wh)+2(lh) SA=_____________+_____________+___________ SA=_____________+_____________+___________ SA=_________

17 #2 You Try! SA= 2(lw)+2(wh)+2(lh) SA=_____________+_____________+___________ SA=_____________+_____________+___________ SA=_________

18 Part 2: Volume

19 To find the volume of any prism, you can use the formula V= Bh,where B is the area of the base, and h is the prism’s height. The base of a RECTANGULAR prism is a rectangle so the base is: l x w To find the volume of a triangular prism, B is the area of the triangular base so the base is: ½ x b x h

20 V = lwh Write the formula. V = l = 29; w = 12; h = 16 Multiply.V = 5,568 in 3 16 in. 29 in. 12 in. #1 You Try! A=bh B= l x w

21 A rectangular prism with base length 6 ft, width 5 ft, and height 7 ft #2 You Try! A=bh B= l x w

22 V = BhWrite the formula. V = ( ) __ B = ; h = __ Multiply.V = m 3 #3 Try Together! A=bh B= ½ x b x h

23 The bases of a prism are always two congruent, parallel polygons. Caution!

24 V = BhWrite the formula. V = ( 6.5 7) __ B = 6.5 7; h = __ Multiply.V = ft 3 #4 You Try A=bh B= ½ x b x h

25 V = BhWrite the formula. V = ( 4.5 9) __ B = 4.5 9; h = __ Multiply. V = ft ft 5 ft 9 ft #5 You Try A=bh B= ½ x b x h


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