Question

Find the perimeter of a triangle whose sides are 3x -7, 2x + 5, -x +11
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Answer 1

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➠ Find the perimeter of a triangle whose sides are (3x - 7) , (2x + 5) , (-x + 11)

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❏ Perimeter of any closed 2-D figure may be described as the boundary or the outer lining of that figure.

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❏ In a n-sided polygon, we simply add all length of side in order to get perimeter.

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❏ Side 1 : 3x - 7

❏ Side : 2x + 5

❏ Side : -x + 11

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Let's Start !

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❖ Here is your answer :)

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Let's add all side of the given triangle to get perimeter.

☯ NOTE : Must do mathematical operation keeping signs in mind.

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$:\implies Perimeter = (Side \; 1) + (Side \; 2) + (Side \; 3)$

$:\implies Perimeter = (3x - 7) + (2x + 5) + (-x + 11)$

$:\implies Perimeter = 3x - 7 + 2x + 5 -x + 11$

$:\implies Perimeter = (3x + 2x -x) + (-7 + 5 + 11)$

$:\implies Perimeter = (4x) + (9)$

$\boxed{ \bold{ \orange{ :\leadsto Perimeter = 4x + 9}}}$

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$\boxed{\boxed{\bold{\therefore Perimeter \; of \; triangle = 4x + 9}}}$

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Hope this helps u.../

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