Changes

==== OER[edit | edit source] ====

==== OER[edit | edit source] ====

# Web resources :

# Web resources :

##[http://www.coolmath.com/reference/circles-geometry.html Cool math] For clear and easy definitions.

##[http://www.coolmath.com/reference/circles-geometry.html Cool math] For clear and easy definitions.

##[http://en.wikipedia.org/wiki/Math_circle#History Wikipedia] Has good explanations on circles.

##[http://en.wikipedia.org/wiki/Math_circle#History Wikipedia] Has good explanations on circles.

##[http://www.khanacademy.org Khan academy] Has good educative videos.

##[http://www.khanacademy.org Khan academy] Has good educative videos.

##[http://www.arvindguptatoys.com Arvind gupta toys] Contains good information.  

##[http://www.arvindguptatoys.com Arvind gupta toys] Contains good information.  

# Books and journals

# Books and journals

## [http://archive.org/stream/schoolgeometry00hall#page/n11/mode/2up School Geometry] By Hall and Stevens. Part3 pageno 143. Contains basic definitions and proofs given by Euclid.

## [http://archive.org/stream/schoolgeometry00hall#page/n11/mode/2up School Geometry] By Hall and Stevens. Part3 pageno 143. Contains basic definitions and proofs given by Euclid.

#*[http://www.mathwarehouse.com/geometry/circle/tangents-secants-arcs-angles.php www.mathwarehouse.com] contains good content on circles for different classes

#*[http://www.mathwarehouse.com/geometry/circle/tangents-secants-arcs-angles.php www.mathwarehouse.com] contains good content on circles for different classes

#*[http://staff.argyll.epsb.ca/jreed/math20p/circles/tangent.htm staff.argyll]  contains good simulations

#*[http://staff.argyll.epsb.ca/jreed/math20p/circles/tangent.htm staff.argyll]  contains good simulations

#*This is a video showing construction of tangent at any point on a circle

#*This is a video showing construction of tangent at any point on a circle