Find a fun t-shirt for the holidays that mashes up your favorite topic and the jolly holiday of Christmas. Wear these tops to share your love of math as well as holiday spirit.

Found on Zazzle

A Christmas tree is depicted by using green shapes in a variety of geometric forms. The shapes are labeled, including Hexagon, Square, Pentagon, Rectangle, Rhombus, and others. The tree sits on a Octagon trunk and is captioned with the fun holiday slogan MERRY CHRISTMATH! This is a fun math geek holiday t-shirt!

Found on Zazzle

Design elements on this holiday shirt are illustrated in a fun style that looks like a bulky knitted sweater. Printed stitches are used to make up math symbols like division and multiplication symbols, the symbol for Pi, and holiday elements like holiday trees, stars, and snowflakes.

Found on Zazzle

A silhouette of Santa Claus on his sleigh, being pulled by reindeer, is featured at the top of this fun math-Christmas mashup t-shirt. Bold text reads "Sleighing Math Problems" using all capital letters in a stylized font. The entire design, done in green and white, is backed by a repeating pattern of math equations in green. This fun holiday design looks great on a black t-shirt as shown here.

Found on Zazzle

A green cone shape is illustrated like a Christmas tree, with yellow stars and colorful ball ornaments. The tree is labeled with different equations to show the measurements of the geometric shape. Even the gift boxes under the tree have mathematical labels. The fun t-shirt design is titled "Oh Geometree".