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D.

Difference of two sides< third side < Sum of two sides
(4-3)<x< (4+3)
1<x<7
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Option D.

As per the property of Triangle, 4 - 3 < X < 4+3
1<X<7
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Solution



To find
We need to determine
    • Which of the given Options describes all values of x, if there is a triangle with sides having lengths 3, 4, and x

Approach and Working out
    • x must be < 3 + 4 and
    • x must be greater than 4 – 3

Thus 1 < x < 7

Therefore, Option D is the correct answer.

Correct Answer: Option D
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