Western media are discussing new "flying triangles" originally from China
The Chinese have unofficially introduced two new futuristic-looking combat aircraft. The general features can be guessed, ...
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Trigonometry in 3 dimensions - Higher
It may be necessary to use Pythagoras' theorem and trigonometry to solve a problem. The shape ABCDEFGH is a cuboid. Length AB is 6 cm, length BG is 3 cm and length FG ...