## Dynamic Geometry & Circle TheoremsThese pages have a page with a dynamic geometry window for each of the eight theorems.
You can use them to work out what the theorems are. ## The Activities- First circle theorem - angles at the centre and at the circumference.
- Third circle theorem - angles in the same segment.
## The dynamic geometry pages- First circle theorem - angles at the centre and at the circumference.
- Second circle theorem - angle in a semicircle.
- Third circle theorem - angles in the same segment.
- Fourth circle theorem - angles in a cyclic quadlateral.
- Fifth circle theorem - length of tangents.
- Sixth circle theorem - angle between circle tangent and radius.
- Seventh circle theorem - alternate segment theorem.
- Eighth circle theorem - perpendicular from the centre bisects the chord
## The proofs- First circle theorem - angles at the centre and at the circumference.
- Second circle theorem - angle in a semicircle.
- Third circle theorem - angles in the same segment.
- Fourth circle theorem - angles in a cyclic quadlateral.
- Seventh circle theorem - alternate segment theorem.
On each proof page is a link to a downloadable pdf version. Tim Devereux [Geogebra pages updated 2/02/15 ] |