AC Lim's answer to Nicole's Primary 6 Maths Measurement Singapore question.

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AC Lim
Ac Lim's answer
12073 answers (A Helpful Person)
1st
I assume the triangle length are diameter for ni and small circles.

Hope this help
Cindy
Cindy
4 years ago
Area of small circle is 18π sq each, need to multiply by 2? Why shaded have to add in the triangle of 36? Thank you.
AC Lim
AC Lim
4 years ago
18 x 22/7 x 22/7 (2 times 22/7, not x2)

Because we take small circle area to minus the of the small circle’s unshaded parts (but this unshaded part we don’t know the area) so I minus from 1/2 big circle and triangle area should not included, so we add in again.
AC Lim
AC Lim
4 years ago
I uploaded another answer for your reference.