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8² + 8²=l²
64 + 64=l²
128=l²
l=√128
b)5²+9²=l²
25+81=l²
106=l²
l≈10,3
a)
10²+(6√2)²=l²
10²+6²+√2²=l²
100+36+2=l²
138=l²
l≈11,75
z twierdzenia pitagorasa:)