Question

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Answer 1

Răspuns:

Fie x lungimea catetelor

${x}^{2} + {x}^{2} = { \sqrt{18} }^{2} \\ 2 {x}^{2} = 18 \\ {x}^{2} = 9 \\ x = 3$

Răspuns A 3 cm

Answer 2

x - lungimea catetelor
x^2 + x^2 = rad 18^2
2x^2 = 18 => x^2 = 18:2
x^2 = 9
x = rad 9 => x=3 cm