I just picked up this book Intro to foundations and fundamental concepts of math (Howard Eves/Carroll Newsom)
Practice problem: In the Rhind papyrus area pf a circle is taken as equal to that of a square on 8/9 of the circles diameter. Show that this is equivalent to taking $\pi=3.1604$
What does equal to that of a square on 8/9 mean?
--I'm not sure if I used the correct tag