rilateral? You could have four straight sides. You could be a checkerboard, a kite, or a yoga mat. What else could you be if you were a quadrilateral? Find out in this installment of the bestselling MATH FUN series by Trisha Speed Shaskan! With creative examples, easy-to-understand text, and engaging art, these entertaining and educational picture books books are perfect for young math lovers to read aloud or read alone.