SOLUTION: Instead of drawing out all the rectangles, what is the rule to find the perimeter of a 100th rectangle. The perimeter of 1st rectangle is 6, second rectangle perimeter is 10. Third

Question 397027: Instead of drawing out all the rectangles, what is the rule to find the perimeter of a 100th rectangle. The perimeter of 1st rectangle is 6, second rectangle perimeter is 10. Third Triangle perimeter is 14. The 5th rectangle perimeter is 18. So, how can I find the perimeter by rule of a 100th rectangle?
Answer by robertb(5830) (Show Source): You can put this solution on YOUR website!
The sequence of perimeters is arithmetic.
.
Therefore the perimeter of the 100th rectangle is .
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