Year 7 - Q5.1.05
20461
Three interior angles of a quadrilateral are \(98^\circ\), \(72^\circ\) and \(85^\circ\). A learner writes \(x=180-98-72-85=-75^\circ\). Identify the mistaken fact and find the correct angle.
Hint
Which shape has an angle sum of \(180^\circ\)?