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:2-page digital version with horizontal layout, prepped for Easel 1-page printable version3 pages of Teacher Note