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secondary 3 | E Maths
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Ugandan Knuckles
Ugandan Knuckles

secondary 3 chevron_right E Maths chevron_right Singapore

How to do this question? Thanks in advance?

Date Posted: 2 months ago
Views: 21

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Eric Nicholas K
Eric Nicholas K's answer
1259 answers (Tutor Details)
1st
Part (a) is to recogise that 135 degrees out of 360 degrees means that the sector takes up 135/360 of the entire circle. The area of the whole circle must be 96 cm2.

For part (b) area of triangle formula given two lengths (here, both lengths are radii) and the included angle is used.

For part (c), we can also approach the question by considering major sector AQB + triangle OAB.
Ugandan Knuckles
Ugandan Knuckles
2 months ago
Thanks!