Surface Area of a Composite Solid

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Presentation transcript:

Surface Area of a Composite Solid

Show work to support answer. Self-check.) Classwork (To be included with tomorrow’s homework on separate paper. Divide into 4 boxes on front and 4 boxes on back, #1-8. Answers in red. Show work to support answer. Self-check.) Find the Surface Area of each figure. Draw figure and show ALL work. #1 #2 #3 #4

Example #1 Dara is building a plant stand. She wants to stain the plant stand, except for the bottom of the larger prism. Find the surface area of the part of the plant stand she will stain. Small Cube Face =bh= 6 faces: Large Cube Face =bh= 5 faces: TOTAL SURFACE AREA Note: We are NOT painting the bottom, so only taking into account 5 faces. *Remember to subtract area of small cube TWICE, since we cannot paint that part.

Example #2 Daniel built a birdhouse shown. What was the surface area of the birdhouse before the hold was drilled? Triangular Prism 2 Bases = 2 Sides = Rectangular Prism TOTAL SURFACE AREA Front & back= Left & Right= Bottom=

(Add to yesterday’s classwork. Answers in red. Show work to support answer. Self-check.) Find the Surface Area of each figure. Draw figure and set up work. Use a calculator. #5 #6 #7 Cydney built a display stand out of two cubes. The larger cube is 8 inches on each side. The smaller cube is 4 inches on each side. She painted the display stand after she put the two cubes together. She did NOT paint the bottom of the display stand. What was the total area?