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## [http://www.mathsisfun.com/geometry/circle.html maths is fun] A good website on definitions for circles.
##[http://www.mathopenref.com/circle.html Open reference] Contains good simulations.
##[http://nrich.maths.org/2490 nrich.maths.org] Refer for understanding Pi.
==== 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.
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#*[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
+#*[http://www.mathopenref.com/circle.html Open reference] Contains good simulations.
+#*[http://nrich.maths.org/2490 nrich.maths.org] Refer for understanding Pi.
#*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