Asked by Pat
the deck in hope's backyard is round. It has 5 posts evenly spaced around the edges to support a trellis. For her birthday party, shewants to connect each post to all the other posts with crepe-paper streamers.How many streamers will she need?
Answers
Answered by
Ms. Sue
What is the perimeter of the deck? How long are the streamers?
Answered by
Pat
That is all the information they give in the problem..
Answered by
Reiny
So your posts would form a pentagon.
The question becomes ....
How many sides and diagonals does a pentagon have?
There are 5 sides, and 5 diagonals (make a sketch to see how)
total streamers = 10
If you know combinations, this would be C(5,2) = 10
The question becomes ....
How many sides and diagonals does a pentagon have?
There are 5 sides, and 5 diagonals (make a sketch to see how)
total streamers = 10
If you know combinations, this would be C(5,2) = 10
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