Properties of Shape - Angles in Special Quadrilaterals - Presentation

In a series of interactive teaching slides designed for exploring the properties of shapes, students delve into the world of quadrilaterals, focusing particularly on their angles. The lesson begins with a discussion about what constitutes a quadrilateral and examples of different types. Students are then invited to engage in hands-on activities, including measuring angles with a protractor and comparing the angles of various quadrilaterals by tearing off corners and aligning them at a point. These exercises encourage students to observe the similarities and differences between shapes such as rectangles, parallelograms, and trapeziums, and to ponder whether all quadrilaterals share certain properties.

The lesson progresses with further investigations into the nuances of quadrilateral angles. Students are challenged to differentiate between a trapezium and an isosceles trapezium, measuring angles to understand the total sum within each shape. Additionally, they must calculate missing angles in given quadrilaterals, applying the knowledge that the sum of interior angles in a quadrilateral is 360 degrees. This concept is reinforced by splitting quadrilaterals into triangles and using the known sum of angles in a triangle to find the sum in quadrilaterals. Independent work tasks students with drawing shapes to refute or confirm statements about angles in quadrilaterals and identifying the names of various shapes created on a geoboard. The lesson concludes with a discussion about relationships between different quadrilaterals and the characteristics of their angles, deepening students' understanding of geometric properties.