1. CIRCLE THEOREMS LO: To understand the angle theorems created with a circle and how to use them. Draw and label the following parts of the circle shown in red: RadiusDiameterChordTangentCircumference

2. Draw a circle Draw a tangent Mark a point, the centre of a circle. Draw the radius, from centre to the tangent. Now measure this angle? What do you get? A radius is perpendicular to a tangent at the point of contact

3. 60º a 36º b 65º c

4. Draw a circle Draw a chord Mark a point, the centre of a circle. Draw the shortest line, from centre to the chord. Now measure this angle? What do you get? What do we know about the angles where the radius and a chord meet? The perpendicular bisector of a chord passes through the centre of a circle. Both angles are equal, creating a Isosceles Triangle.

5. 52º a 55º b 27º c

6. Draw a circle Draw a Diameter Mark a point, the centre of a circle. Draw two chords from the diameter so they meet at a point. The angle formed in a semicircle equals 90º. Now measure this angle? What do you get?

7. 38º b a c

8. CIRCLE THEOREMS LO: To understand the angle theorems created with a circle and how to use them.

9. 23º c a 72º b LO: To understand the angle theorems created with a circle and how to use them.