Question

Find the length of the third side. If necessary, round to the nearest tenth. 6 5​

Answer 1

7.81

Explanation:

Pythagorean theorem

`\sqrt{6^(2) +5^(2) }`

`√(61)`= 7.81

c = 7.81

Law of Cosines

`c=\sqrt{b^(2) +a^(2)-2ba*cos(C) }`

`c=\sqrt{6^(2)+5^(2)-((2*6*5)*cos(90)) }`

c = 7.81