Task 1: Rotations

Use your notebook to answer the following: a) Before you were given this Geogebra, you were to determine the E'O by looking at the figure. Your goal is to still communicate what the length of E'O is AND be able to describe how could I have reasoned that without actually using the Geogebra. b) What other unique noticings or wonderings are you having after seeing this geogebra?