The perimeter of an isosceles triangle is $40$ cm. If its unequal side measure $16$ cm find the length of the equal sides .

15 c m

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14 c m

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12 c m

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none of these

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Solution

The correct option is A $12 c m$
Let the length of equal sides be $x .$ $
Two sides are equal
Then,
$x + x + 16 = 40$

$2 x = 24$

$x = 12$ cm

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