Now change matrix b to a 3 x 3 matrix and enter these values for b:
b =
1.2 1.4 3.1
2.2 1.1 5.6
3.7 4.2 6.7
then select a • b to calculate the product:
77 39 −33
1.2 1.4 3.1
2.2 1.1 5.6
3.7 4.2 6.7
=
c11 c12 c13
c11 =
c12 =
c13 =

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

In my opinion i believe it’s a-kite