geometrija v ravnini Flashcards

1
Q

pravokotnik (obseg, ploščina, diagonala)

A

o=2(a+b)
S=ab
d=√a2+b2 .

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2
Q

Kvadrat (obseg, ploščina, diagonala)

A

o=4a
S=a2
d=a√2

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3
Q

Paralelogram(obseg, ploščina)

A

o=2(a+b)
S=ava=ab*sina

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4
Q

romb(obseg ploščina

A

o=4a
S=ava=a2*sina=(ef):2

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5
Q

trikotnik(obseg, ploščina)

A

o=a+b+c
S=(cb*sina):2=√s(s-a)(s-b)(s-c)

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6
Q

enakostranični trikotnik(obseg, ploščina, višina)

A

o=3a
S=(a2√3):4
v=(a√3):2

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7
Q

pravokotni trikotnik(obseg, ploščina)

A

o=a+b+c
S=(ab):2

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8
Q

deltoid (obseg, ploščina)

A

o=2(a+b)
S=ef:2

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8
Q

trapez(obseg, ploščina)

A

o=a+b+c+d
S=(a+b)v:2

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8
Q

enakokraki trapez(obseg, ploščina)

A

o=a+2b+c
S=(a+c)v:2

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8
Q

ploščina očrtanega kroga+stranica a

A

S=n:2R2sinf
a=2R*sin(f:2)

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9
Q

ploščina včrtanega kroga+stranica a

A

S=nr2tan(f:2)
a=2r*tan(f:2)

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9
Q

Obseg pravilnega n kotnika

A

o=na

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9
Q

diagonala

A

d=n(n-3):2

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10
Q

ploščina n kotnika izražena s stranico a

A

S=(na2):(4tan(f:2))

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11
Q

vsota notranjih kotov

A

180(n-2)

11
Q

notranji kot

A

a=180(n-2):n

12
Q

središčni kot

A

f=360:n