[br]Each circle is centered at one of the corners of the square, with radius equal to the side of the square.[br][br]Notice the area inside the circle where the four circles overlap. [br][br][br]QUESTION: How can you "describe" that area algebraically? [br][br]More specifically, how can you ask GeoGebra to highlight it like it was done below?[br][br]
-- Think about the equation of a circle. What does it describe? [br][br]-- We have four circles, so we have an equation for each one of them.[br][br]-- We have to start from the equation, but we'll use inequalities (four of them!) to highlight the area.