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Aktuelle materialer
- Holograms
- Euler-linjen
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Holograms
A holographic illusion (for example, in the toy called a "3D Mirascope") can be produced by joining two parabolic reflectors.
Holograms
Euler-linjen
Euler-linjen er den linje som forbinder de tre skæringspunkter - højdernes, midtnormalernes og medianerens - i en trekant.
Euler-linjen
Undersøg disse påstande:
1 Euler-linjen findes kun i spids-vinklede trekanter
2 I visse tilfælde er Euler-linjen blot et punkt
3 Vinkelhalveringslinjernes skæringspunkt ligger også på Euler-linjen
4 Der er et fast forhold mellem de to linjestykker på Euler-linjen
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