Properties of Shape - Calculate Angles - Presentation

In a comprehensive set of teaching slides focused on calculating angles, students are guided through various activities designed to enhance their understanding of the properties of shape. The lesson begins with a review of what has been previously learned about angles on a straight line and angles around a point. This foundational knowledge is then applied in a series of exercises where students are tasked with calculating missing angles. The first activity prompts students to consider the relationship between two angles, 'a' and 'b', on a straight line, reinforcing that their sum equals 180 degrees. They are encouraged to work out the answers by writing number sentences that express these angle relationships.

Further activities build on this understanding. Students are presented with scenarios involving multiple angles around a point, where they must apply the principle that the sum of these angles is 360 degrees. Through various examples, they learn to write multiple number sentences that reflect these angle facts. Additionally, the lesson includes reasoning activities where students must deduce the size of equal angles around a point or divide a given angle total equally among remaining angles. The lesson progresses to more complex problems, such as calculating angles based on given conditions in a pie chart, representing car sales by colour. Independent work tasks consolidate learning, requiring students to complete missing values, write number sentences for given images, and calculate missing angles using provided clues. The lesson culminates in a discussion that encourages students to articulate their understanding of angle facts and how to apply them to calculate unknown angles.