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A different angle (Posted on 2003-10-10)

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.)

not too sure but i think i got it

| Comment 12 of 23 |

6√5 i think. What i did is i represented the area as 3x² and the perimeter as 8x, so i got 3x² - 8x =60 then i solved the quadratric formula and got x=6, and Pythagorean theorem from there... and got 6√5, might be wrong, and probably am but wth i'll try...

Posted by iggyb387 on 2003-10-15 20:06:16

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