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 The right pentagon (Posted on 2004-06-12)
There is a pentagon ABCDE such that angles A, C, and E are all right angles and it is concave at angle C.

If a ray starting at D was aimed at C, it would go exactly 1 inch before going through C, and would eventually go through A.

If BC and AE are both 5 inches, what is the area of this pentagon?

 See The Solution Submitted by Gamer Rating: 3.3333 (6 votes)

 Subject Author Date answer K Sengupta 2008-07-11 11:54:09 Pai da ma vije 2004-07-10 10:50:30 Solution Gromit 2004-06-25 01:23:15 Solution Tristan 2004-06-13 13:20:26 observation rixar 2004-06-13 12:16:30 Solution Nick Hobson 2004-06-13 10:26:15 Drawing Tristan 2004-06-12 12:33:16 And the answer is .... Larry 2004-06-12 12:30:42 OH... Larry 2004-06-12 11:58:56 re: C is 90 and concave? - yes Tristan 2004-06-12 11:54:16 C is 90 and concave? Larry 2004-06-12 11:30:44

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