Try the following GRE quantitative reasoning question that tests your understanding of circles and area of inscribed triangles.
Question#99:
Point $C$ lies on a circle that has center $O$ with a radius of $2$ units. If $\overline{AB}$ is a diameter of the circle, what is the greatest possible area of triangle $ACB$ ?

$\quad 2$

$\quad 2\sqrt{2}$

$\quad 3$

$\quad 4$

$\quad 4\sqrt{2}$
Ankit Sah says
A. 2 is the answer .
Mahendra Dabral says
The answer is D, you may want to check with the video explanation to see if you took the same approach, or perhaps it was a careless mistake.