Lesson 3 In this lesson, children are taught to use a protractor to measure obtuse angles. They are taught to avoid common pitfalls such as using the wrong scale. There is a teaching presentation accompanied by differentiated activities with a range of fluency, reasoning and problem-solving questions. Year 5 Mathematics Content Descriptors V8.4 Estimate, measure and compare angles using degrees. Construct angles using a protractor ACMMG112 V9 estimate, construct and measure angles in degrees, using appropriate tools including a protractor, and relate these measures to angle names AC9M5M04 Differentiation: There are three levels of differentiation in this pack: ‘working towards,’ ‘expected’ and ‘greater depth’. Level of this Pack: Age: 9-10 Australia: Grade 5...