Question

find the sum of the measures of all the four angles of a quadrilateral​

Answer 1

Answer:

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°.

Step-by-step explanation:

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Answer 2

Answer:

we know that 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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