Page 82 - IM_FL_Geometry_Print Sample

Student Response
• units. • units. • units. • units.
Activity Synthesis
Ask students to share their strategies for each problem. Record and display their responses for all to see. To involve more students in the conversation, consider asking:
• “Who can restate [ ]’s reasoning in a di erent way?”
• “Did anyone have the same strategy but would explain it di erently?” • “Did anyone solve the problem in a di erent way?”
• “Does anyone want to add on to [ ]’s strategy?”
• “Do you agree or disagree? Why?”
Explain to students that the part of the circumference between two radii is called an arc of the circle.
1.2 What Does It Mean to Be a Circle?
10 minutes
This activity reviews work students did with compasses in previous units in order to solidify the precise de nition of a circle as the set of points equidistant to a given point.
Unit 7 Lesson 1: What’s a Circle? 9