The figures below show two different ways of arranging four identical triangles of grey poster board on top of a white square. The square has sides equal to x + y, while the hypotenuse of each triangle is represented by the variable c.

Hazel wrote the following statements to prove that c^2 = x^2 + y^2.

Question

The figures below show two different ways of arranging four identical triangles of grey poster board on top of a white square. The square has sides equal to x + y, while the hypotenuse of each triangle is represented by the variable c.

Hazel wrote the following statements to prove that c^2 = x^2 + y^2.

anonymous · Answer

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anonymous · Answer

Which is the first incorrect statement in Hazel’s proof?

A Statement 6
B Statement 7
C Statement 4
D Statement 5