Question

write the sum of all the angle in a qudrilateral​

Answer 1

We have learned that the sum of internal angles of a quadrilateral is 360°, that is, ∠ABC + ∠BCD + ∠CDA + ∠DAB = 360°. let's prove that the sum of all the four angles of a quadrilateral is 360 degrees. We know that the sum of angles in a triangle is 180°.

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Singular Matrix Example:

Answer 2

the sum of internal angles of a quadrilateral is 360°, that is, ∠ABC + ∠BCD + ∠CDA + ∠DAB = 360°