- Naming the parts of a circle
- Two radii make an isosceles triangle
- All circles are similar
- An arc measures its central angle
- Adding arcs
- Arcs written with x
- Equal angles, equal arcs, equal chords
- An inscribed angle is half its arc
- Why an inscribed angle is half its arc
- Same arc, same angle
- Opposite angles add to 180°
- Missing angles with x
- Which quadrilaterals fit in a circle
- Unlocks after
- Opens up