# Question: this question had been attempted by 4 tutors already please...

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This question had been attempted by 4 tutors already, please do not take the question if you have previously attempted it as you could not verify your answer with clear cut explanation, thank you for your understanding.

Please just do part (d). If you are going to say that the four triangles are congruent (especially the two triangles outside of the square), kindly support your proof using given information. I cannot see how the triangles (the length of the sides are a, x-a) outside the square are congruent to the one inside the square (the lengths are a, and a).