Practise the method.Example 1A triangle has sides of 5cm,5cm and 8cm. Classify it by its sides.Show worked answerAnswer: IsoscelesTwo sides are equal, and 5+5>8, so it is a valid isosceles triangle.Example 2A quadrilateral has four equal sides but does not have a right angle. What is its most specific name?Show worked answerAnswer: RhombusFour equal sides make a rhombus; without right angles it is not a square.Example 3Which statement is always true?Show worked answerAnswer: Every square is a rectangleA rectangle has four right angles. Every square has four right angles and therefore meets this definition.