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Question

Two sides of a scalene triangle measure 7 cm and 3 cm. What could be the measure of the third side?


A
9 cm
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B
10 cm
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C
11 cm
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D
12 cm
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Solution

The correct option is A 9 cm

Given, the lengths of two sides of a scalene triangle are 7 cm and 3 cm.
We know that the sum of two sides of a triangle is always greater than the third side.
So, the third side must be less than 10 cm(7 cm + 3 cm).
The length of the side that is less than 10 cm among the given options is 9 cm.
Hence, the length of the third side is 9 cm.


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