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What is the perimeter of a polygon with sides measuring; (a) cm,(a+1) cm;(a+2) cm and 3(a+3)?

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To find the perimeter of a polygon, simply add the sides.
Here, the sides are: a, a+1, a+2, and 3(a+3)
So,

a+(a+1)+(a+2)+3(a+3)
Now, do the distributive property and combine like terms,
a+a+1+a+2+3a+9
6a+12

The answer is 6a + 12. Hope this helps and have a terrific day!

User Dali
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