Question

proof of angle sum property of a quadrilateral

Answer 1

Let quadrilateral is ABCD
Step1 - join the non adjacent side {AC and BD}
Step2- In triangle ABC Sum of all angles will be 180
Step3- Similarly Sum of all angles in triangle ACD will be 180.
Step4- Sum of all angles of Quadrilateral=Dum of all angle of triangle ABC&ACD=180+180=360

HENCE PROVED

Answer 2

Answer:

Proof: Let ABCD be a quadrilateral. ... Hence, the sum of all the four angles of a quadrilateral is 360°.

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