Math Puzzle of the Week

December 29, 2008

Geometry: A rhombus has sides of length 10 and its diagonals differ by 4. What is its area?

From NCTM

Answer available January 5, 2009 next puzzle.

Answer to math puzzle of December 22:

Simplify: root (3+2root2)-root(3-2root2)
From NCTM

Solution: Take the square root of the square: = root of the square

For more math puzzles, check out http://www.mathpuzzle.com/, http://mathschallenge.net/, http://www.princeton.edu/~mathclub/puzzles4.html and http://mathforum.org/k12/k12puzzles/

  Andromeda Galaxy©copyright 2008, Louis Bookbinder - booky1@earthlink.netMade with Macintosh
updated 30 December 2008
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