If two sides of a triangle are 8 cm and 6 cm and its perimeter is 26 cm. Find the third side of the triangle.

12 cm

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10 cm

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9 cm

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11 cm

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Solution

The correct option is A
12 cm

Perimeter = a +b +c (i.e. the sum of length of all the sides)
$\Rightarrow$ Third side = 26 - 8 - 6
= 26 - (8+6)
= 26 - 14
=12

Third side = 12 cm

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