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A triangle has sides of length 7cm and 6cm. calculate length of the third side. a. 2.42b. 3.61c. 4d. 4.5
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A triangle has sides of length 7cm and 6cm. calculate length of the third side.

a. 2.42b. 3.61c. 4d. 4.5

User Arash Moeen
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We assume the triangle is a right triangle and the side of length 7 cm is the hypotenuse. Then the Pythagorean theorem applies.
7^2 = 6^2 + (third side)^2
third side = √(49 - 36) = √13
third side ≈ 3.61

The appropriate choice is ...
b. 3.61
User Nat Dempkowski
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