Ian Tan's answer to Catherine Wee Mui Chin's Primary 6 Maths Measurement Singapore question.
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Angle subtended at centre of circle is 90 degrees.
So area of one sector is 1/4 of area of circle with radius 20cm.
And area of triangle is 1/2 base x height.
Base=Height=20cm
So area of one sector is 1/4 of area of circle with radius 20cm.
And area of triangle is 1/2 base x height.
Base=Height=20cm
Date Posted:
2 years ago
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