Use congruence to identify all the categories of shapes in a satellite image of downtown Washington, D.C., and of Conyers, GA. Work with your groups to determine when two shapes are close enough to be considered congruent. [br][br]How many categories of shapes are there in each picture? How many copies of each category show up in each picture? Try to count up and record your data to the side of each picture.[br] [br]After both activities, the whole class will discuss and compare answers. How was congruence determined? What different ways of comparing blocks were used? Think back to vocabulary from yesterday – [b]rigid transformations, translations, reflections, and rotations.[/b]