Question

Determine a medida x deste triângulo retângulo:
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Answer 1

$hip = 3\sqrt{5}\\cat_1 = 6\\cat_2 = x\\\\(hip)^2 = (cat_1)^2 + (cat_2)^2\\(3\sqrt{5})^2 = 6^2 + x^2\\45 = 36 + x^2\\x^2 = 45 - 36\\x^2 = 9\\\sqrt{x^2} = \sqrt{9}\\x = 3$