Question

Prove: the diagonals of a rectangle are equal

Answer 1

AB=(a;0)-(0;0)=a
AD= (0;b)-(0;0)=b
BC=AD
AB=DC
that means its a square. Using Pythagorean theorem
DB^2=AD^2+AB^2 ; AC^2=AB^2+BC^2
and DB^2 and AC^2 are equal

Answer 2

Answer

Explanation:

Trust me this is the answer