geometry
posted by Courtney
Polly decides to use a wall of the house as one sideof the rectangular dog pen. She plans to use the 24 ft. of fencing (1 ft. sections) for the other 3 sides. What are the dimensions ofthe best dog pen for polly's poodle? Explain

Ms. Sue
I helped you with the last problem. Now it's your turn.
What do you think are the best dimensions?
We'll be glad to check your answer. 
Courtney
A = l + w
the best dimensions would be lenght 10 feet and width 4 feet
24  4 = 20
20 divided by 2 (lenght) 10
10 by 10 by 4 = 24 
Ms. Sue
If one length is along the house, then you still have 24 feet to divide among three sides.

Courtney
24 divided by 3 (sides) = 8
8 divided by 2 (sides) = 4
24  4 = 20
20 divided by 2 (sides) = 10
10 by 10 by 4 = 24 feet of fencing 
Ms. Sue
You don't need fencing along the wall of the house.
How about dimensions of 12 by 6, with 12 feet along the house?
12 + 6 + 6 = 24 feet of fencing. 
mike
i almost thought this was an optimization problem

Courtney
i kinda understand but not sure how i write the problem up
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