Shape Explore right angles Identify horizontal and vertical

Day 3: Identify whether angles are greater than or less than a right angle.

Problem solving and reasoning questions Draw a shape with 2 right angles that is

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Shape Explore right angles Identify horizontal and vertical lines, parallel and perpendicular lines Objectives Day 3 Identify whether angles are greater than or less than a right angle. © hamilton-trust. org. uk 1 Year 3

Day 3: Identify whether angles are greater than or less than a right angle. Which one of these two shapes is a square? One, both or neither? © hamilton-trust. org. uk All the sides in each shape are the same length… 2 Year 3

Day 3: Identify whether angles are greater than or less than a right angle. Each angle in a square must be a right angle. © hamilton-trust. org. uk Have a look at this set square… 3 Year 3

Day 3: Identify whether angles are greater than or less than a right angle. Notice how one of its corners is a ‘square’ corner… exactly a right angle. © hamilton-trust. org. uk 4 Year 3

Day 3: Identify whether angles are greater than or less than a right angle. Use the set square to check which is the square. This is the square. © hamilton-trust. org. uk This is a rhombus. 5 Year 3

Day 3: Identify whether angles are greater than or less than a right angle. less more We can draw a small square to show a right angle. © hamilton-trust. org. uk Which angle is less than a right angle? 6 Which angle is more than a right angle? Year 3

Problem solving and reasoning questions Draw a shape with 2 right angles that is not a square. Identify angle in this shape that is more than 90 degrees. Set a clock to 3 o’clock. Move the minute hand clockwise through 3 right angles. What is the time? What is the angle between the hands of a clock at 6 o’clock? Draw a triangle with 1 angle less than 90 degrees and 1 angle more than 90 degrees. Is the third angle more or less than a right angle? True or false? • A horizontal line is always at right angles with a vertical line. • All shapes with 2 pairs of parallel lines are rectangles. • A pair of perpendicular lines must be horizontal and vertical. © hamilton-trust. org. uk 8 Year 3