Erfana Beevee Binte Hassan Shariff's answer to Kimi's Secondary 4 A Maths Singapore question.

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Erfana Beevee Binte Hassan Shariff
Erfana Beevee Binte Hassan Shariff's answer
275 answers (Tutor Details)
1st
The pink triangle is a right isosceles triangle, made up of 2 congruent right triangle. Apply pythagoras’ theorem.