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From Karnataka Open Educational Resources
→Learning objectives
# A quadrilateral is a plane closed figure having 4 sides and 4 angles.
# 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.
# The sum of all 4 angles of any quadrilateral always equals to 360 degrees.
# The opposite angles of any quadrilateral are supplementary.
# If any 3 angles of a quadrilateral are known the fourth angle can be found using angle sum property.
===Notes for teachers===
===Notes for teachers===
===Activity No # 1. Angle sum property of a quadrilateral. ===
===Activity No # 1. Angle sum property of a quadrilateral. ===
