Question 92
In the diagram given below, the triangles $\triangle OAB$, $\triangle OBC$, $\triangle OCD$ are isosceles right triangles with $\angle OAB$, $\angle OBC$, $\angle OCD$ being the right angle, respectively. Find the area of the triangle $\triangle OAB$ if the area of the triangle $\triangle OCD$ is $12$.
