- Arm bone; circle part - Forearm bone - Half-diameter - Range of operation on arm bone - Straight line from the centre of a circle - Straight line from the centre to the circumference of a circle - Surrounding area
- A straight line on a circle passing through the centre point - Distance across a circle - I am kept in to deter thickness, in circle - Straight line through a circle - Thickness - Transverse measurement - Twice radius