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Kolmnurga ümbermõõt ja pindala 6. klassis.
On antud joonis.
Pane mängima. Jälgi, mis toimub.
Kui mäng lõpeb, proovi liigutada kolmnurga tioud ja vaata kuidas muutub kolmnurga õmbernõõt ja pindala. Võid ümber nimetada tipud.