Christmas MT's answer to Akul's Primary 6 Maths Measurement Singapore question.

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Christmas MT
Christmas Mt's answer
3275 answers (A Helpful Person)
Find the circumference of a circle. Then find 3/4 of it, since only 3 curved parts of a circle is in the figure perimeter. Then add the sides. Hence total perimeter is 3/4 of circle + 2 (21cm)