@MathMath901 flip the entire thing horizontally, it becomes a circle and a rectangle inscribed in the circle, when the new rectangle is a perfect square, the area is the maximum. so the area is (6/sqrt(2))^2=18, half it for the answer is 9.
BREAKING: President Trump says he will issue a $5,000 "dividend" to every adult citizen in the US if the Republicans win the midterm elections.
There are currently ~245 million US citizens age 18+, meaning this dividend would cost ~$1.2 trillion.
This would mark the biggest economic stimulus payment since the pandemic.