This classic black t-shirt features a white rectangle graphic with labels "a" and "b" representing its sides. Below the shape, the shirt displays the formulas for calculating the perimeter (P=2a+2b) and area (A=ab) of a rectangle. Crafted from a comfortable-looking fabric, this tee is perfect for math enthusiasts, students, or anyone who appreciates a touch of geek chic in their wardrobe. Wear it to class, math club, or simply as a conversation starter. Show off your love for geometry with this unique and stylish shirt!