Max Maths, Year 5, Learn together, Angles review (2)

In an engaging lesson from Max Maths for Year 5, students revisit the concept of measuring angles using a protractor. The lesson begins with a clear demonstration of how to use the instrument to determine the size of an angle in degrees. Students are shown how to read the correct scale on the protractor - either the inner or outer scale - to accurately measure the angle. For example, angle LMN, when measured with the inner scale of the protractor, is found to be 50 degrees. This hands-on approach helps students become comfortable with the tool and the process of measuring angles.

The lesson then moves on to practical application, where students are tasked with measuring various angles using a protractor. They are introduced to the four main types of angles: acute, right, obtuse, and reflex. Each type of angle is defined by its size in degrees relative to a right angle. An acute angle, like angle MNO, measures less than 90 degrees. A right angle, exemplified by angle PQR, is exactly 90 degrees. An obtuse angle is one that exceeds 90 degrees but is less than 180 degrees, such as angle STU at 120 degrees. Lastly, a reflex angle, which is greater than 180 degrees but less than 360 degrees, is represented by angle VWX at 200 degrees. Through measuring these angles, students solidify their understanding of angle types and how to classify them based on their measurements.