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Konstrukce R2
Jsou dány dvě soustředné kružnice k1(S;2cm), k2(S;3,5cm) a bod A, pro který platí ISAI=5cm. .
Sestrojte všechny rovnostranné trojúhelníky ABC tak, aby vrchol B ležel na kružnici k1 a vrchol C na kružnici k2.
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