12.0 cm
6.0 cm
which similarity statement expresses the relationship between the two triangles?
azyx~ acab
oazyx~aacb
azyx~ acba
azyx~aabc
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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