Question

In a quadrilateral 2angles are 20°,80°find other 2 angles if both are equal

Answer 1

let the give 2 equal angle be x

now given angles = 20 , 80

then we know that sum of all angles of a quadrilateral = 360

according to question

x + x + 20 + 80 = 360

2x = 360-100

x = 260/2

x = 130

Thus each angles are 130

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Answer 2

in quadrilateral sum of all angles is 360°

let unknown angles are x n x

so ,2x+100°=360°

2x=260°

x=130°