LOH JIA YI's answer to hellos's Secondary 2 Maths Singapore question.

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LOH JIA YI
Loh Jia Yi's answer
9 answers (Tutor Details)
1st
I am assuming ABCD is a square. From there i use x to form algebra equations. Equation 1 is the area of the big triangle minus the area of 2 small triangle. Equation 2 is the area of abcd so its x times x