Verify that sum of interior angles of a quadrilateral is 360 by activity method
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Every quadrilateral have 4 sides
let sides be 65,72,21 and 4th side be x
65+72+21+x= 360
158+x= 360°
x=360-158
x=202°
let sides be 65,72,21 and 4th side be x
65+72+21+x= 360
158+x= 360°
x=360-158
x=202°
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