Using dot product of vectors, prove that a parallelogram , whose diagonals are equal , is a rectangle.

Prove: In a parallelogram, opposite sides are equal.

Using vector method, prove that if the diagonals of a parallelogram are equal, then it is a rectangle.

Using vectors prove that the diagonals of a parallelogram bisect each other.

By using vectors prove that a quadrilateral is a parallelogram if and only if the diagonals bisect each other.

Find the area a parallelogram whose diagonals are vec a=3 hat i+ hat j-2 hat ka n d vec b= hat i-3 hat j+4 hat kdot

The product of a vector with itself is equal to

Prove by vector method that the parallelograms on the same base and between the same parallels are equal in area.

Prove by vector method that the diagonals of a rhombus bisect each other at right angles.

Show that the diagonals of a parallelogram divide it into four triangles of equal area.

The vector product of two vectors will have maximum magnitude when theta is equal to