Dear Sir, In Q 5 of exercise 7.4, when we take C as the origin, the triangle PQR must lie in 3rd quadrant having its coordinates as (-x,-y) whereas in the textbook solution they are taken as (x,y) as if they all lie in first quadrant. Kindly elaborate.

Asked by  | 14th Apr, 2013, 06:13: PM

Expert Answer:

Yeah, you are right. When we will take C as the origin, then the triangle PQR will lie in third quadrant and hence, all of its x and y coordinates should be negative. It seems like the answer in the NCERT is wrong probably. However, please note that the answer for the area would not change by doing so. 

Answered by  | 17th Apr, 2013, 09:09: PM

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