Most theorems were of various forms of fruit and made as pictures. This was most likely made as a pillow, a popular baby present. It's unusual in the amount and skill of watercolor detail painted over the theorem shapes. This one is edged in blue ribbon. A fruit themed one of similar shape is found in the Katcher Collection and dated to NJ about 1840 in the catalog for "the Instruction of Young Ladies." at the exhibit of that name in the Fenimore Art Musuem Cooperstown, NY in 2016.