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secondary 4 | E Maths
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Oddenen
Oddenen

secondary 4 chevron_right E Maths

Please help me with all the qn except for qn bi.
Thank you!:)

Date Posted: 6 years ago
Views: 295

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Wai Keong
Wai Keong's answer
7 answers (Tutor Details)
1st
20ai) According to parallelogram law, vector OA=vector CB. Because vector BC is opposite of vector CB, change the direction by multiplying by -1

20aii) Triangle law of vector addition

20bii) In future, note that in a trapezium, when divided into two from its diagonals forms two triangles. Note area of trapezium as 1/2 x sum of two parallel sides divided by 2 x height. The height will always be the same.
Oddenen
Oddenen
6 years ago
Thank you very much !:D
Wai Keong
Wai Keong
6 years ago
You're welcome