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- 1. YEAR 5 MATHS EASIERCHALLENGE 13/07/20 LO: TO IDENTIFY AND DESCRIBE 2D SHAPES
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- 4. PROPERTIES OF 2DSHAPES Take a look at some of the language used to describe the properties of 2-dimensional (2D) shapes below: curved longer v sides straight shorter 2-dimensional equal vertex/vertices symmetry length
- 5. PROPERTIES OF 2DSHAPES Take a look at some of the language used to describe the properties of 2-dimensional (2D) shapes below: obtuse angle right angle acute angle
- 6. CIRCLE 1 curved side 0vertices almost infinite lines of symmetry Sum of interior angle is 360° How many curved sides? How many vertices? How many lines of symmetry? What do all the interior angles measure?
- 7. TRIANGLE 3 straight sides 3vertices up to 3 lines of symmetry 3 interior angles How many straight sides? How many vertices? How many lines of symmetry? How many interior angles? 3 acute angles What type of angles can you see in this shape? Challenge: What is the sum of all interior angles in a triangle? 180°
- 8. SQUARE 4 straight sides 4equal length sides 4 vertices 4 lines of symmetry 4 interior angles 4 right angles How many straight sides? How many vertices? How many lines of symmetry? How many interior angles? What type of angles can you see in this shape? What does each interior angle measure? each interior angle is 90° 90° 90° 90° 90° Challenge: What is the sum of all interior angles in a quadrilateral? 360°
- 9. TRAPEZIUM 4 straight sides 2equal length sides 4 vertices 1 line of symmetry 4 interior angles 2 acute angles 2 obtuse angles How many straight sides? How many vertices? How many lines of symmetry? How many interior angles? What type of angles can you see in this shape?
- 10. RECTANGLE 4 straight sides 2long sides 2 short sides 4 vertices 2 lines of symmetry 4 interior angles 4 right angles How many straight sides? How many vertices? How many lines of symmetry? How many interior angles? What type of angles can you see in this shape? What does each interior angle measure? each interior angle is 90° 90° 90° 90° 90°
- 11. RHOMBUS 4 straight sides 4equal length sides 4 vertices 2 lines of symmetry 4 interior angles 2 acute angles 2 obtuse angles How many straight sides? How many vertices? How many lines of symmetry? How many interior angles? What type of angles can you see in this shape? How many pairs of interior angles? 2 pairs of interior angles
- 12. REGULAR PENTAGON 5 straightsides 5 vertices up to 5 lines of symmetry 5 interior angles 5 obtuse angles How many straight sides? How many vertices? How many lines of symmetry? How many interior angles? What type of angles can you see in this shape?
- 13. REGULAR HEXAGON 6 straightsides 6 vertices up to 6 lines of symmetry 6 interior angles How many straight sides? How many vertices? How many lines of symmetry? How many interior angles? What type of angles can you see in this shape? 6 obtuse angles
- 14. REGULAR HEPTAGON 7 straightsides 7 vertices up to 7 lines of symmetry 7 interior angles How many straight sides? How many vertices? How many lines of symmetry? How many interior angles? What type of angles can you see in this shape? 7 obtuse angles
- 15. REGULAR OCTAGON 8 straightsides 8 vertices up to 8 lines of symmetry 8 interior angles How many straight sides? How many vertices? How many lines of symmetry? How many interior angles? What type of angles can you see in this shape? 8 obtuse angles
- 16. REGULAR NONAGON 9 straightsides 9 vertices up to 9 lines of symmetry 9 interior angles How many straight sides? How many vertices? How many lines of symmetry? How many interior angles? What type of angles can you see in this shape? 9 obtuse angles
- 17. REGULAR DECAGON 10 straightsides 10 vertices up to 10 lines of symmetry 10 interior angles How many straight sides? How many vertices? How many lines of symmetry? How many interior angles? What type of angles can you see in this shape? 10 obtuse angles
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- 21. U&A TASKS Write yourown clues to describe a 2D shape for someone at home to guess! You can choose any 2D shape. Make sure to describe angles and sides.
- 22. REASONING TASK Explain youranswer.
- 23. ANSWERS NOW IT ISTIME TO CORRECT YOUR ANSWERS! USE A DIFFERENT PEN TO MARK AND CORRECT YOUR ANSWERS LIKE WE WOULD DO IN CLASS.
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- 25. PRACTICE TASKS - Threestraight side - Three equal angles - Same length sides - One line of symmetry - Four straight sides - Opposite sides are the same length, two short and two long - Four angles, all right angles - Two lines of symmetry - Four straight sides - Sides are all the same length - Four angles, all right angles - Four lines of symmetry - Four straight sides - Sides are different lengths - Four angles, two are right angles and other two are different sizes - No lines of symmetry
- 26. PRACTICE TASKS - Fourstraight sides - Four angles (diagonal are the same) - Two sets of parallel lines - Eight straight sides - Eight equal angles - Eight lines of symmetry - Five straight sides - Five equal angles - Five lines of symmetry - Ten straight sides - Ten equal angles - Ten lines of symmetry
- 27. U&A TASKS ANSWERS Write yourown clues to describe a 2D shape for someone at home to guess! You can choose any 2D shape. Make sure to describe angles and sides. Various answers rectangle
- 28. REASONING TASK ANSWERS Explain youranswer. False! A 2D shape made of straight lines always has the same number of angles as sides.