Eric Nicholas K's answer to Candice lim's Secondary 3 E Maths Singapore question.
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Good afternoon Candice! Here are my workings for the second part.
I assume you have not learnt the formula of a triangle,
0.5 * length * length * sin (included angle)
for the equilateral triangle. But if you have already learnt it, you can use it directly.
As for the areas of sectors and lengths of arcs, these can be thought of as proportions of a circle. Because if you cut a circle into four equal parts, the area and the arc length is also cut into four equal parts.
For E Maths, your final answer should be left in decimals.
I assume you have not learnt the formula of a triangle,
0.5 * length * length * sin (included angle)
for the equilateral triangle. But if you have already learnt it, you can use it directly.
As for the areas of sectors and lengths of arcs, these can be thought of as proportions of a circle. Because if you cut a circle into four equal parts, the area and the arc length is also cut into four equal parts.
For E Maths, your final answer should be left in decimals.
Date Posted:
4 years ago
Noted with thanks on your excellent advice, Mr Eric.
Yes, I will bear that in mind on the different between E maths and A maths final answers presentation, thanks again for highlighting. Really appreciated it :)
Stay safe, pls take care and have a good weekend :D
Yes, I will bear that in mind on the different between E maths and A maths final answers presentation, thanks again for highlighting. Really appreciated it :)
Stay safe, pls take care and have a good weekend :D
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