1. Circle

2. A Circle features……. … the distance around the Circle… … its PERIMETER Diameter … the distance across the circle, passing through the centre of the circle Radius … the distance from the centre of the circle to any point on the circumference

3. A Circle features……. … a line joining two points on the circumference. … chord divides circle into two segments … part of the circumference of a circle Chord Major Segment/Arc Minor Segment/Arc ARC

4. Angle at the centre Consider the two angles which stand on this same chord/Arc a) Central Angle subtended by the minor arc. b) Angle subtended by major arc Chord What do you notice about the angle at the circumference? It is half the angle at the centre We say “If two angles stand on the same chord, then the angle at the centre is twice the angle at the circumference” A