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Spark Plug

Spark Plug. Write 3 examples of a triangle you see in the room. Write 3 examples of a circle you see in the classroom. Write 3 examples of a rectangle you see in the classroom. Names of 2D Figures. 3 Triangle 10 decagon 4 Rectangle 11 hendecagon 5 Pentagon 12 dodecagon 6 Hexagon

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Spark Plug

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  1. Spark Plug • Write 3 examples of a triangle you see in the room. • Write 3 examples of a circle you see in the classroom. • Write 3 examples of a rectangle you see in the classroom.

  2. Names of 2D Figures 3 Triangle 10 decagon 4 Rectangle 11 hendecagon 5 Pentagon 12 dodecagon 6 Hexagon 7 Heptagon 8 Octagon 9 Nonagon

  3. 3-D Shapes Pyramids • Only has one base • Named by it’s base ( put “al” on end if it ends with “gon and “ar “ if it ends with “angle”) • Comes to a point • Triangles for sides Prisms • Named by the two identical bases ( put “al” on end if it ends with “gon and “ar “ if it ends with “angle”) • Rectangles for sides • Has a flat top and bottom

  4. CRCT Formula Sheet:

  5. Area Formula review: • Rectangle: A= l x w • Triangle: A= ½ bh • You can find the surface area of any 2 or 3 dimensional figure by “decomposing” it

  6. Decompose to find the area:

  7. Let’s try:

  8. Try this one:

  9. Last one:

  10. Spark Plug: Find the surface area.

  11. VOLUME: • Prisms: V= Bh (big B means to find the area of the base) • V= l x w x h for rectangular prisms ONLY • Pyramids: V= 1/3Bh (big B means to find the area of the base)

  12. Let’s try these:

  13. Try some of these:

  14. Just a few more:

  15. Now try this one:

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