Oh, did you think I meant an illegal and unsustainable way to get rich while pretending to distribute household products?
No, I meant a way to produce a highly stable, large building using limited machinery and scaffolding.
Tough on the elevators and room furnishings, and absolutely impossible for window washers!
Tough on the elevators and room furnishings, and absolutely impossible for window washers!
Or in a math context, we think of pyramids as objects with a pointed top, square base and triangular sides. However, pyramids can have bases with 3 or more edges. All the faces have 3 sides.
Pyramids and prisms are similar but not the same. Prisms have two multi-sided faces on opposite ends. The number of sides on those two faces gives the prism its name. All the other faces have 4 sides. In a right prism, the side faces are at right angles or 90∘to the base.
Notice that second shape, with the orange bottom. It looks like a box. Yes, that's what it's called most of the time. Its official name is right rectangular cuboid. The shape with the green 6-sided bottom is called a hexagonal prism. It's made up of two hexagons connected by 6 rectangles.
Oblique prisms are shapes with faces that are NOT at right angles or 90∘to the base.
Antiprisms are shapes that contain two similarly-sided figures, one above the other but twisted so the vertices do not line up. The two shapes are connected by triangles rather than by quadrilaterals as in a prism. If you think it's hard to visualize from the description, try drawing one!
Now, back to pyramids. How about this familiar shape that combines both pyramids and prisms?
" ... everything under the sun is in tune, but the sun is eclipsed by the moon."
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