BAVANI's answer to Adwin's Secondary 1 Maths Singapore question.

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BAVANI
Bavani's answer
19 answers (Tutor Details)
1st
Hi can ask your fellow students if they got the same answer
Adwin
Adwin
4 years ago
Thanks for this but the answer is incorrect; it should be 150°.

I have also verified the answer by drawing the triangle to scale using the same ratio, cutting it out and measuring it with the protractor.

Can't figure out a way to solve it properly using geometrical rules though.