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From Karnataka Open Educational Resources
→Useful websites
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=Additional Information=
=Additional Information=
==Useful websites==
==Useful websites==
−* Effective Introduction to Quadrilateral [[http://www.shodor.org/ihnteractivate/discussions/Quadrilaterals/]]<br>
+* Effective Introduction to Quadrilateral [http://www.shodor.org/ihnteractivate/discussions/Quadrilaterals/ click here]<br>
−* Quadrilateral is also tetragon, quadrangle [[http://www.mathopenref.com/quadrilateral.html]]<br>
+* Quadrilateral is also tetragon, quadrangle [http://www.mathopenref.com/quadrilateral.html click here]
==Reference Books==
==Reference Books==
