Find the coordinates of A....?
In the picture below the points OABC form a parallelogram, where
O = (0, 0)
B = (9, 7)
C = (6, 2)
(1) What are the co-ordinates of A?
(2) What are the areas of the right angled triangles (a) ONC, (b) OBM and (c) CBL
(3) What is the area of the parallelogram?
I realize that question (2) is easy, but I've written it just in case it gives some clue as to question (3).....
- RealProLv 76 months agoFavorite Answer
In light of parallelograms being mentioned we recall the definition of a parallelogram
vector CB = vector OA
Since CB = <3,5>
And O = (0,0)
Area of parallelogram is given by the cross product of its two neighboring sides, e.g. <3,5> × <6,2> = ?