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A different angle (Posted on 2003-10-10) Difficulty: 3 of 5
Look at this shape:

Assume AB = AF = FE = ED and BC = CD, and all the angles in the shape are 90 degrees.

Let A be the area of this shape (in cm^2), and P -- the perimeter of this shape (in cm).

If A - P is 60, what is the length of line AC?

See The Solution Submitted by Lewis    
Rating: 1.9167 (12 votes)

Comments: ( Back to comment list | You must be logged in to post comments.)
Here's the answer ... | Comment 16 of 23 |
the small line is x so the large one is 2x.
so we got 3x²-8x=60
-> x=6
so AC=√180=13.416
  Posted by Adrian Aisemberg on 2003-10-19 09:21:32
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