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Montāžas Teksta

  • What are Cross-sections?
  • Hello and welcome to geometry class. Today, we are going to be discussing cross-sections.
  • A cross-section is the shape we get when we cut right through an object. They allow us to see what is inside an object.
  • There are 4 cross-sections of a cylinder. One is vertically, one is horizontally, and two are diagonal. If you were to cut right through the middle of this cylinder, you would end up with two-halves that are symmetrical.
  • Let's take a look at some cross-section examples with 3-D shapes.
  • This 3-D shape is a rectangular prism. It has 4 different cross-sections that you can do. If you were to cut this shape in half down the middle with a cross-section, you would end up with two symmetrical sides. The cross-section lines are vertically, horizontally, and diagonally.
  • This 3-D shape is a cone. There are 4 different cross-sectional lines you can do to cut the shape in half. If you cut it vertically down the middle, then you will have two symmetrical sides, but if you cut it diagonally and horziontally, then they will not be symmetrical.
  • Thanks for coming to geometry class and letting me explain what cross-sections are and in what ways you can cut 3-D shapes into cross-sections.
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