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Geofogalmak#1

Geometria, pont, egyenes és szög

<MONDAT ELEJE><MONDAT VÉGE>
A geometria ezzel foglalkozik: ... ... a tárgyak alakja és mérete.
A pontnak nincs ... ... semmilyen kiterjedése.
A pontok jelölésére ... ... nagybetűket használunk.
Az egyenes hosszúsága ... ... végtelen.
Az egyenesek jelölésére ... ... kisbetűket használunk.
Az egyenest egy pontja ... ... két félegyenesre bontja.
Az egyenesen felvett két pont ... ... egy szakaszt határol.
A szakasz jelölése történhet ... ... a határoló pontok nevével.
Egy pontból kiinduló két félegyenes ... ... a síkot két szögre osztja.
A szög csúcsa: ... ... a pont, amelyből kiindul a két félegyenes.
A szög szárai: ... ... a csúcsból kiinduló félegyenesek.
A szögek elnevezésére ... ... a görög ábécé kisbetűit használjuk.
α görög betű ... ... kiolvasva: alfa.
β görög betű ... ... kiolvasva: béta.
γ görög betű ... ... kiolvasva: gamma.
δ görög betű ... ... kiolvasva: delta.
A szög mértékegysége: ... ... 1 fok, jele: 1°.
A teljesszög ... ... nagysága: 360°.
A nullszög ... ... nagysága 0°.
Az egyenesszög ... ... nagysága 180°.
A derékszög ... ... nagysága 90°.
Ha α hegyesszög, ... ... akkor 0° < α < 90°.
Ha α tompaszög, ... ... akkor 90° < α < 180°.
Ha α homorúszög, ... ... akkor 180° < α < 360°.
Created by: MRX71
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