Let the three points

be three vertices of a parallelogram.

- Find the points which are permissible fourth points of the parallelogram.
- Find the area of the triangle .

- There are three possible points,
- The area of the triangle is given by

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Stumbling Robot

A Fraction of a Dot
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Find a point satisfying conditions if given three vertices of a parallelogram

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Let the three points

be three vertices of a parallelogram.

- Find the points which are permissible fourth points of the parallelogram.
- Find the area of the triangle .

- There are three possible points,
- The area of the triangle is given by

I believe part b. should be cross product of A-C and B-C, not A and B. Same answer though.