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Angle Investigations for more starters visit doodlemaths.com/starters Geometry: Properties of Shape Year 3: Recognise angles as a property of shape. Recognise right angles Year 4: Identify acute and obtuse angles. Compare shapes based on their angles Year 5: Reason about polygons based on their angles Morning starter: Quick draw a 3 x 3 grid on your whiteboard. Answer each question by drawing the correct image in the grid square. Explore… Think about other 2d shapes that you know. Describe their angles. Can you spot any patterns? An angle the same as (equivalent to) 90 degrees A shape that only has acute angles A shape with 8 obtuse angles A quadrilateral with one acute angle An angle less than 90 degrees A quadrilateral with two acute and two obtuse angles An obtuse angle A quadrilateral shape with two right angles An angle of 180 degrees
