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→Concept # 2.Properties of quadrilaterals
==Concept # 2.Properties of quadrilaterals==
==Concept # 2.Properties of quadrilaterals==
===Learning objectives===
===Learning objectives===
# There are certain characteristic properties by which a quadrilateral is identified.
# A quadrilateral is a plane closed figure having 4 sides and 4 angles.
# The sum of all 4 angles of any quadrilateral always equals to 360 degrees.
===Notes for teachers===
===Notes for teachers===
===Activity No # 1. Angle sum property of a quadrilateral. ===
===Activity No # 1. Angle sum property of a quadrilateral. ===