Calculating Angles Around a Point - PowerPoint

The educational resource aimed at Year 5 students focuses on the properties of shapes, specifically on calculating angles around a point. The PowerPoint presentation begins by defining an angle as the measure of turn between two lines and recaps the degrees in a full, half, quarter, and three-quarter turn, establishing that there are 360° in a full turn, 180° in a half turn, 90° in a quarter turn, and 270° in a three-quarter turn. Students are then encouraged to sort facts based on these turns, understanding the relationship between right angles and degrees of turn.

Building on this foundation, the presentation guides students through the process of calculating missing angles around a point using subtraction and addition. For example, if two angles around a point total 180°, and one angle is known, the other can be found by subtracting the known angle from 360°. The resource further explores the concept by providing interactive slides where students can apply their knowledge to calculate missing angles, and by using division and fractions to calculate angles without measuring them, such as finding how many degrees are in a tenth of a turn. Worksheets are provided for practice, including a variety of problems that require students to use their reasoning and problem-solving skills to calculate angles and decipher phrases using the angles of letters on a wheel.