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pole trojkata o bokach:
[tex] 3\sqrt{7} [/tex]
[tex]4 \sqrt{7} [/tex]
[tex]5 \sqrt{7} [/tex]
jest równe?




Odpowiedź :

[tex]Jest \ to \ trojkat \ prostokatny:\\ a = 3\sqrt{7}\\b = h = 4\sqrt{7}\\c = 5\sqrt{7}\\\\P = \frac{1}{2}ah\\\\P = \frac{1}{2}\cdot3\sqrt{7}\cdot4\sqrt{7} = 6\cdot\sqrt{7^{2}} = 6\cdot7=\boxed{42} \ \ [j^{2}][/tex]