Question

Prove that the sum of the four angles of a quadrilateral is 360o.

Answer 1

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By the formula

(n-2)180 n=number of sides

We know that sum of interior angles of a triangle is 180

We can divide a quadrilateral into 2 triangles.

When divide they will be 2 triangles and angle sum property of 2 triangles is

2×180=360


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