Answered

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Which set of numbers cannot represent the lengths of the sides of a triangle A) 7,9,12 B) 8,6,7 C) 8,20,12 D) 10,13,20

Sagot :

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Hi Friend

 

You should make use of the Triangle Inequality Theorem, which states that

the sum of the lengths of two sides of a triangle must always be greater than the length of the third side

 

As you test the answers, you will notice that in C 7+11=18, which is also equal to the length of the other side. This is impossible so the answer is C.

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