Many ways to the solution. I think @pizzachain came up with the easiest and thus the best approach.
Here is how I divided in my head also using a calculator for half circle.
SAT
"Introduced in 1926, its name and scoring have changed several times; originally called the Scholastic Aptitude Test, it was later called the Scholastic Assessment Test, then the SAT I: Reasoning Test, then the SAT Reasoning Test, and now, simply the SAT."
Quote from: wikipedia.org/wiki/SAT
Many ways to the solution. I think @pizzachain came up with the easiest and thus the best approach.
Here is how I divided in my head also using a calculator for half circle.
SAT
"Introduced in 1926, its name and scoring have changed several times; originally called the Scholastic Aptitude Test, it was later called the Scholastic Assessment Test, then the SAT I: Reasoning Test, then the SAT Reasoning Test, and now, simply the SAT."
Quote from: wikipedia.org/wiki/SAT