Practise the method.Example 1How many sides does a quadrilateral have?Show worked answerAnswer: 4A quadrilateral has 4 sides.Example 2Two angles together make a right angle. One is 60∘. What is the other angle in degrees?Find the missing angleFind the missing angleA right angle is split by a ray. The angle between the horizontal ray and the dividing ray is 60°. The angle between the dividing ray and the vertical ray is x°. The square marks the full right angle. Diagram not to scale. Use the labelled measurements.60°x°Diagram not to scaleShow worked answerAnswer: 30A right angle is 90∘.Subtract 60:30∘.Example 3Which name describes a polygon with 4 sides?Show worked answerAnswer: quadrilateralA quadrilateral is a polygon with 4 sides.