Question

Find the value of x if the two vectors a =
2
2
3
2 are at right angles to each other. Find their lengths also
3
If cand 6 form two adjacent sides of a right angled triangle, find the vector which represents the third side.
Find also the vector which represents the segment of the line joining the middle point of the hypotenuse to the opposite
vertex of the triangle.
ILS.C. 1978​

Answer 1

I think 6 is the answer