Question

prove that the sum of al the angles of quadrilateral is 360.​

Answer 1

SOLUTION

Let ABCD be a quadrilateral whose one diagonal is AC.

Sum of angles of a quadrilateral ABCD = Sum of angles of ∆ABC + sum of angles of ∆ACD

= 180°+ 180° [Angle sum property of a triangle]

= 360°

Hence proved

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Answer 2

Answer:

sorry but your answer is wrong you have to find x not factorise

Step-by-step explanation:

A quadrilateral is a polygon which has 4 vertices and 4 sides enclosing 4 angles and the sum of all the angles is 360°. When we draw a draw the diagonals to the quadrilateral, it forms two triangles. Both these triangles have an angle sum of 180°. Therefore, the total angle sum of the quadrilateral is 360°.