Exploring the relationships between different lengths in a circle.
Instructions
Part 1: Exploring the properties of the radii of a circle.
- Mark three points, A, B and C on the circle using
. - Using
, draw a line from the centre O to points, A, B and C respectively. - Measure the radius OA, OB and OC using
. - What do you notice about the length between each of these three points and the centre O?
- Drag
the red dot to change the size of the circle. - What do you notice about the radii as the size of the circle changes?
- Using
, draw a line from the red dot to green dot. - Measure the diameter using
. - Compare it with the radius in part 1.
- What do you notice about the diameter of the circle and its radius?
- Drag
the red dot to change the size of the circle. - What do you notice about the diameter of the circle as the size of the circle increases?