If you go all the way around the circle, what are you measuring?
Draw a line from the center to the edge of the circle. What is this called?
Which parts of the circle always pass through the center?
Is an arc always smaller than the whole circle?
Can you create a straight line that divides the circle into two equal parts? What is it called?
What do we call the region formed by two radii and an arc?
Move any point in a chord. Does the chord always stay inside the circle?
Draw a line that touches the circle at only one point. What do you notice?
Which parts change when you drag points in a circle?
Which remain constant even you drag the point in a circle?