About the Math Center

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Lewis Clark State college houses the Idaho Regional Mathematics Center for Region 2. The center is directed by Kacey Diemert and supported by Ryan Dent, our Regional Mathematics Specialist. The intent of the center is to provide professional mathematics support with both content and pedagogy to K-12 teachers in Region 2. The members of the Regional Mathematics Centers have experience in K-16 mathematics education, designing and delivering professional development, instructional technologies, and educational research. We are able to provide both regional and school-specific support in mathematics education. We welcome input from schools and districts as to the type of professional development they need. Our professional development begins with promoting mathematical thinking, problem solving, and the habits of mind students need to effectively understand and apply mathematics.

Monday, December 12, 2016

Wordless Geometry Conundrum

From NCTM's September 2016 issue of Mathematics Teacher

What fractional part of the regular pentagram is shaded?






Given Answer: 1/2
A regular pentagram can be decomposed into triangular regions as colored in the figure below. The yellow and turquoise triangles are congruent. The problem's shaded region consists of two turquoise triangles, one yellow triangle and one red triangle, as does the unshaded region.

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