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From Karnataka Open Educational Resources
→Notes for teachers
===Notes for teachers===
===Notes for teachers===
===Activity No # 1. Angle sum property of a quadrilateral. ===
===Activity No # 1. Angle sum property of a quadrilateral. ===
{| style="height:10px; float:right; align:center;"
{| style="height:10px; float:right; align:center;"
