Lesson 6 In this lesson, children learn the meaning of hatch marks and use this to help them find missing angles in isosceles and right-angled triangles. They use other known facts from previous lessons to help them solve missing angle problems. There is a teaching presentation accompanied by differentiated activities with a range of fluency, reasoning and problem-solving questions. Year 6 Mathematics Content Descriptors V8.4 Investigate, with and without digital technologies, angles on a straight line, angles at a point and vertically opposite angles. Use results to find unknown angles ACMMG141 V9 identify the relationships between angles on a straight line, angles at a point and vertically opposite angles; use these to determine unknown angles, communicating reasoning AC9M6M04 Differentiation: There are three levels of differentiation in this pack: ‘working towards,’ ‘expected’ and ‘greater depth’. Level of this Pack: Age: 11-12 Australia: Grade 6...