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Állítsd meg a videót és
próbáld meg kiszámítani

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ennek a háromszögnek a területét,

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két segítséget adok hozzá:

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elsőként vedd észre, hogy a háromszög egyenlő szárú,

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másodszor pedig a Pitagorasz-tétel

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esetleg használható valahogy.

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Rendben, akkor vezessük le együtt az egészet.

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Mindannyian emlékszünk, hogy egy háromszög területe

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egyenlő 1/2-szer az egyik oldalhossz szorozva a hozzátartozó magassággal.

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Itt megadtak egy oldalhosszt,

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ennek az alapnak a hosszát,

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ami 10 egység hosszúságú,

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Ez akkor annyi, mint

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félszer 10, ami 5,

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5.ször 12 az 60,

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60 területegység, az egység bármi lehet,

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tehát ezt kaptuk területként.