Question

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

Answer 1

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!