prove the following angle properties of circles: CCT the angle at the centre of a circle is twice the angle at the circumference standing on the same arc the angle in a semicircle is a right angle angles at the circumference, standi

1. Circular Logic 4 - identify correct circle geometry theorem
2. Circular Logic 5 - concyclic quadrilaterals
3. Circular Logic 3 - angle at circumference of circle
4. Circular Logic 2 - angle in a semicircle
5. Circular Logic 1 - identify correct circle geometry theorem