What is the center point of this circle?
C
Are these circles concentric? Why?
Yes, because they share the same center point
Is line DE a diameter?
Yes
Are these circles concentric? Why?
No! They do not share the same center point
What are concentric circles?
Circles that share the same center point
Is line CE a radius?
Yes
Are these circles concentric?
Yes! they share the same center
Is line AB a chord?
Yes
Name all radii of this circle
Lines: QT, QU, QV
Are these circles concentric? Why?
No, because they do not share the same center
Are all diameters a chord? Why
Yes. because the line ends touch the circle
Name all radii of this circle
Lines: CD, CE, CF
What is the center point of this circle?
Q