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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.
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.
Date Posted:
6 years ago
Thank you very much !:D
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