Geometrie ex 5 Flashcards

1
Q

Ecuația dr cu panta

A

mAB=yB-yA/xA-xA

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2
Q

Dr paralele

A

m1=m2

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3
Q

Dr perpendiculare

A

m1*m2=-1

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4
Q

ec dr care trece printr-un punct

A

y-yM=m2(x-xM)

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5
Q

Mediatoarea

A
  1. mAB
  2. M mijl AB
  3. dr perpendiculare
  4. ec mediatoarei: y-yM=m2(x-xM)
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6
Q

Lungimea unui segment/Distanta dintre 2 puncte

A

AB=rad((xB-xA) ^2+(yB-yA)^2)

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7
Q

lungimea unui vector

A

AC=rad(a^2+b^2)

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8
Q

Ecuația dreptei

A

det: x y 1
xA yA 1
xB yB 1

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9
Q

Pct coliniare

A

det=0

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10
Q

Distanta de la un pct la o dreapta ax+bx+c=0

A

mod(axM+byM+c)
/
rad(a^2+b^2)

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