Spearfish, S.D. artist Dick Termes works with students at Mandan High School  to use a six-point linear perspective during his final art workshop for both art and geometry students on Thursday. Termes developed the unique perspective system called "Termesphere" to draw and paint on spheres using his math and art skills to create unique artwork. Termes spent the week in Bismarck-Mandan high schools using the cross-curricular concept of combining math, geometry and art. Mandan High School geometry teacher Melissa Gartner said the two days spent with Termes gives students the ability to see surface area and volume of cubes and spheres in three-dimensions. The workshops with Termes were partly funded by a grant from the Bismarck Art and Galleries Association (BAGA). His work is currently on display at Bismarck State College, University of Mary and BAGA.