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Grade 9

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  • 3D shapes with two identical, parallel faces, and the same cross-section all the way through
    Prisms
  • A measurement of size, such as length, width, or height.
    Dimension
  • The 2D shape formed when a 3D object is cut straight through.
    Cross-section
  • The top point of a shape where sides meet
    Apex
  • The total area of all the outside surfaces of a 3D shape.
    Surface Area
  • The straight vertical distance from the base to the top, measured at a right angle (90°).
    Perpendicular Height
  • The area of the base (bottom face) of a 3D shape.
    Base Area
  • The slanted distance from the edge of the base to the apex
    Slant Height
  • The flat surfaces of a 3D shape.
    Faces
  • The lines where two faces meet on a 3D shape.
    Edges
  • Having the shape of a circle or related to a circle.
    Circular
  • The amount of space inside a 3D shape.
    Volume
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