The three angle of a quadrilateral are 80 degrees 70 degree and 120 degrees forth is
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90.... degree....
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your answer...
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Very Easy
Step-by-step explanation:
sum of all angles in quadrilateral = 360°
sum of all angles in quadrilateral = 360°80° + 70° + 120° + x = 360°
sum of all angles in quadrilateral = 360°80° + 70° + 120° + x = 360°x = 360° - 270° = 90°
sum of all angles in quadrilateral = 360°80° + 70° + 120° + x = 360°x = 360° - 270° = 90°x = 90° = Right Angle
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