keturkampiai Flashcards

1
Q

apibrezimas

A

4 taskai nesantys vienoje tieseje sujungti atkarpomis

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2
Q

keturkampiai skirstomi i

A

iskiliuosius
neiskiliuosius

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3
Q

keturkampio plotas lygus

A

ji sudaranciu trikampiu plotu sumai

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4
Q

lygiagretainio apibrezimas

A

keturkampis kurio priesingos kraštinės yra lygiagrecios vadinamas lygiagretainiu

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5
Q

3 lygiagretainio savybes

A

istrizaines susikerta ir dalija viena kita pusiau, priesingos krastines ir priesingi kampai yra lygus, prie vienos krastines esanciu kampu suma lygi 180

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6
Q

lygiagretainio ploto formule ir kaip kitka rast

A

S=a×h
a=S:h
h=S:a

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7
Q

trapecijos apibrezimas

A

keturkampis kurio 2 priesingos kraštinės yra lygiagrecios, kitos 2 - nelygiagrecios

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8
Q

trapeciju rusys

A

lygiasone stacioji

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9
Q

trapecijos elementai

A

a ir b trapecijos pagrindai
h aukstine
m vidurine linija

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10
Q

trapecijos 2 ploto formuled

A

S=m×h
S=(a+b)×h
2

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11
Q

kaip trapecijose rast h

A

2S:(a+b)

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12
Q

kaip trapecijose rast a/b

A

a=2S-b×h
h

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13
Q

rombo apibrezimas

A

lygiagretainis kurio visos krastines yra lygios

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14
Q

rombo istrizaines

A

kertasi staciu kampu ir dalija viena kita pusiau

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15
Q

rombo plotas( teorija)

A

lygus krastines ir i ja nuvreztos aukstines ilgiu sandaugai
lygus istrizainiu ilgiu sandaugos pusei
lygus ji sudaranciu staciuju trikampiu plotu sumai

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16
Q

kvadrato plotas

A

17
Q

staciakampio plotas

A

a×b

18
Q

statusis trikampis

A

a×b
2

19
Q

trikampis

A

a×h
2