Xavier Sng's answer to Sharon's Primary 6 Maths Geometry Singapore question.

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Xavier Sng
Xavier Sng's answer
801 answers (A Helpful Person)
I am just answering to your question why 4r=140cm.

The first contributor did what he could based on a very dodgy diagram. Instead of casting a down vote, why not communicate with him so that he can arrive at the correct answer? I am sure he is very willing to help. Just my two cents. Regards