## Ask Singapore Homework?

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### See 3 Answers

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The prelude to both parts of the question

Date Posted:
4 days ago

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Parts a and b, with working in degree format for the angle

Date Posted:
4 days ago

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Parts a and b, with working in radian format for the angle

Date Posted:
4 days ago

uh for part a the ans is 13.3cm

Ok, let me confirm again, likely a miscalculation of an angle on my wnd

I used Desmos online to do my calculations rather than a physical calculator.

The subsequent arc length calculations also did not seem to show an error.

(Arc length formula for radian format is r0, so the perimeter of the shaded region is just that arc length plus the 3 cm and 5 cm lengths)

Check the answer key again, but I still believe it's 13.9 cm.

(My workings could still be incorrect, but there are cases of answer keys being incorrect as well)

13.3 cm given by the answer key seems wrong.

ohk thx