vectori Flashcards by Unknown Unknown

Q

Regula triunghiului

A

AB+BC=AC

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Q

Regula paralelogramului

A

AB + AC= AD

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Q

Asociativitatea vectoritlor

A

(a+b)+c = a+(b+c)

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Q

Comutativitatea vectorilor

A

a+b = b+a

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Q

Elemenetul neutru al vectorilor

A

a+0 = 0+a = a

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Q

Descompunerea unui vector dupa i si j

A

AB=(xb-xa)i + (yb-ya)j

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Q

Modulul unui vector

A

AB= sqrt (xb-xa)^2 + (yb-ya)^2

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Q

Coliniaritatea a doi vectori

A

a/c = b/d

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Q

Paralelismul a doi vectori

A

a/c = b/d

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Q

Perpendicularitatea a doi vectori

A

u * v = 0
sau
ac + bd=0

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Q

Teorema bisectoarei(AD bisectoarea triunghiului ABC, D apartine lui BC)

A

AB/AC=BD/DC

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Q

distanta dintre 2 puncte A si B

A

AB=sqrt(xb-xa)^2 + (yb-ya)^2

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