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From Karnataka Open Educational Resources
166 bytes added
, 07:10, 16 December 2013
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| # 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. === |