The diagonal length of 10 inch square cake is: 10X2.5 (about 2.5cm/ inch) = about 25cm. The size of a square cake is diagonal, because the diagonal is the longest, and this length can fit into a cake box of 10 inch. )?
Extended data
Conversion of cake size
Take a circular mold as an example. On the premise that the height of the cake is not much different, the ratio of volume is actually the ratio of the bottom area, and the formula of the bottom area = π× the square of radius, so it is actually the ratio of the square of radius.
Take a chestnut, 8-inch cake round mold: 10-inch cake round mold =8/2 square: 10/2 square =16: 25 =1:1.56; Then changing 8 inches to 10 inch only needs to multiply the dosage of the formula by 1.56.
The same is true for the conversion of square size, just compare the proportion of the bottom area, and the square area is equal to half of the diagonal product.