Properties of Shape - Measure Angles in Degrees - Presentation

In a comprehensive lesson on measuring angles in degrees, students are introduced to the properties of shapes with a focus on understanding and identifying various types of angles. The session begins by asking the class to recap how many degrees are in a right angle, setting the stage for deeper exploration into angle measurements. The first activity involves using sentence stems to describe the turns made by the minute hand on a clock face and comparing these turns to a right angle. For instance, students might note that the turn from 12 to 4 is larger than a right angle and identify it as an obtuse angle, while the turn from 12 to 2 is smaller, making it an acute angle.

Building on this, the second activity requires the use of a compass to complete a table that correlates turns, degrees, the type of angle, and the fraction of a turn. For example, a turn from North East to South East clockwise is identified as a 90-degree right angle, constituting a quarter of a turn. The lesson also includes reasoning exercises where students must determine which angle is the odd one out based on certain criteria, such as not being a multiple of 45 degrees. Finally, independent work tasks challenge students to describe turns, identify odd angles out, and validate the truth of statements about angles, fostering critical thinking and reinforcing their understanding of angle measurement.