Odpowiedź:
[tex] |AB| = \sqrt{(5 - 1 {)}^{2} + (3 - 3 {)}^{2} } = \sqrt{ {4}^{2} } = \sqrt{16} = 4[/tex]
[tex] |BC| = \sqrt{(3 - 5 {)}^{2} + (0 - 3 {)}^{2} } = \sqrt{( - 2 {)}^{2} + ( - 3 {)}^{2} } = \sqrt{4 + 9} = \sqrt{13} [/tex]
[tex] |AC| = \sqrt{(3 - 1 {)}^{2} + (0 - 3 {)}^{2} } = \sqrt{ {2}^{2} + ( - {3)}^{2} } = \sqrt{4 + 9} = \sqrt{13} [/tex]|BC|=|AC|