Diagram #1: Use the angle tool to measure angle BED:[br]1) Click on the angle tool.[br]2) Click on point B, then point E, then point D.[br][br]You can move the points to change the measures of the angles.
What do you notice about the measure of angles CEA and BED in Diagram #1?
What key fact is represented in Diagram #1?[br][br][i]Refer to the "Key Facts and Discoveries" document page 1.[/i]
Diagram #2: Use the angle tool to measures of angle BCE:[br]1) Click on the angle tool.[br]2) Click on the points in the order listed above.[br][br]You can move the points to change the measures of the angles.
What is the sum of the measures of the angles in Diagram #2?
What key fact is represented in Diagram #2?[br][br][i]Refer to the "Key Facts and Discoveries" document page 1.[/i]
Diagram #3: Use the angle tool to measures of angle DAB.[br]1) Click on the angle tool.[br]2) Click on the points in the order listed above.[br][br]You can move the points to change the measures of the angles.
What is the sum of the measures of the angles in Diagram #3?
What key fact is represented in Diagram #3?[br][br][i]Refer to the "Key Facts and Discoveries" document page 1.[/i]