stained-glass.odtstained-glass.odt

An architect must to do a stained glass window for the entrance of the church.This stained glass window is a half circle with a diameter of 3m.The architect want to inscribed a square in the half circle. But, he doesn’t know the mesure of the square’s sides.can you help him?
After that he wants to inscribed a circle in this square.What is the radius of this circle?
To finish the architect wants to make an other square in the stained glass window’s center. His sides mesure 10 cm.To make this one he wants to know the mesure of his diagonal.Find it!