The masses of 444 samples of baking soda are measured to perform an experiment in science class.

Idon't know that language

Use pythagorean’s theorem and find the missing side lengths of the two smaller triangles and add them together
13^2 - 12^2 = 5
15^2 - 12^2 = 9
5+9 = 14
14 is the length of each side of the square
14^2 + 14^2 = 19.8
19.8 is the diagonal length of the inside if the square

Ihave advice just read it carefully or look it up on google