in the adjacent figure ,a quadrilateral is formed by joining two triangles find the sum of all the angles ofvthe quadrilateral
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In the given figure we have two triangles
∆ABC and ∆BCD.
We know sum of angles of triangle is 180°.
sum of angles A CBA ACB BCD CBD and D is equal to sum of angles in quadrilateral ABCD.
Sum of the angles of quadrilateral is 180°+180°
That is 360°
∆ABC and ∆BCD.
We know sum of angles of triangle is 180°.
sum of angles A CBA ACB BCD CBD and D is equal to sum of angles in quadrilateral ABCD.
Sum of the angles of quadrilateral is 180°+180°
That is 360°
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7
Answer:
sum of a triangle is 180°.
sum of two triangles = 180° + 180° = 360 °
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