The three dimensions of space are commonly described as what?
AnswerLength, width and height
Three-dimensional space has three independent directions, often called length, width and height.
Science · Facts & stats
3D facts & stats
7 fact-checked facts about three dimensions and 3D shapes, each with the reason behind it. 5 more are in today's round and join this page after it closes.
The basics
How does a 3D printer usually build an object?
AnswerBy adding material layer by layer
3D printing is additive manufacturing: it builds objects one thin layer at a time.
Going deeper
What is the volume of a cube with 3 cm sides?
Answer27 cubic centimeters
A cube's volume is side cubed: 3 x 3 x 3 = 27 cubic centimeters.
How many edges does a cube have?
Answer12
A cube has 12 edges: four on the top, four on the bottom and four vertical ones.
Stereolithography (SLA) 3D printing hardens what material?
AnswerLiquid resin, using ultraviolet light
SLA printers use UV light to cure liquid photopolymer resin layer by layer.
Expert level
How many Platonic solids are there?
Answer5
There are exactly five Platonic solids: tetrahedron, cube, octahedron, dodecahedron and icosahedron.
What is the formula for the surface area of a sphere?
Answer4πr²
A sphere's surface area is 4πr²; (4/3)πr³ is its volume.
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