3 concentric circumferences with radii 1, 2 and 3
My translation of the exercise:
Consider 3 concentric circumferences (same center T) with radii 1, 2 and 3, respectively. If we take one point from each circumference, we can draw a triangle. Suppose we choose three points so that the area of the triangle is the maximum possible. Then point T is
a) the barycenter of the triangle.
b) the incenter of the triangle.
c) the circumcenter of the triangle
d) the orthocenter of the triangle
e) an excenter of the triangle