# Sept. 11 Math Mystery Year Puzzle: Construction on the Pentagon Begins

Construction of the Pentagon began on September 11 of the

*Mystery Year*. As students solve clues to find the year, they review operations with fractions and exponents, find the length of one side of a regular pentagon when given the perimeter, do measurement conversions, and work with square numbers. This puzzle is great for 6th graders and up to use any time.Your PDF download includes:

- 1-page printable student puzzle
- 2-page digital version with horizontal layout and larger print
- 3 pages of Teacher Notes including step-by-step solutions, historical notes, and more
- 1-page
*How to Use History-Mystery Puzzles*

**Common Core Standard:**5.NBT.B.7, 4.NF.B.3c, 5.NF.A.1, 6.NS.B.3, 6.EE.A.1, 6.EE.B.5, 6.EE.B.7, 6.RP.A.3d

**File Format:**PDF

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Construction of the Pentagon began on September 11 of the

*Mystery Year*. As students solve clues to find the year, they review operations with fractions and exponents, find the length of one side of a regular pentagon when given the perimeter, do measurement conversions, and work with square numbers. This puzzle is great for 6th graders and up to use any time.Your PDF download includes: