Understanding 2D Shapes: Properties and Characteristics
Explore the properties of various 2D shapes like circles, triangles, squares, trapeziums, and rectangles in terms of sides, vertices, symmetry, angles, and parallel lines. Understand the unique features of each shape to identify and differentiate them effectively.
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Presentation Transcript
Properties of 2D Shapes Take a look at some of the language used to describe the properties of 2-dimensional (2D) shapes below: v curved longer sides straight shorter 2-dimensional equal vertex/vertices symmetry length
Guess my shape Click on the sound buttons and then click the arrow on your keyboard or touch the screen to reveal the shape.
Our Learning Click on the speaker to hear your task for today Miss Adams Name of shape Drawing of shape Number of sides Number of Vertices
circle How many curved sides? 1 curved side How many vertices? 0 vertices How many lines of symmetry? infinite lines of symmetry What do all the interior angles measure? Sum of interior angle is 360 How many pairs of parallel lines? no pairs of parallel lines
triangle How many straight sides? 3 straight sides How many vertices? 3 vertices How many lines of symmetry? up to 3 lines of symmetry How many interior angles? 3 interior angles What type of angles can you see in this shape? 3 acute angles How many pairs of parallel lines? no pairs of parallel lines
square How many straight sides? 4 straight sides 4 equal length sides How many vertices? 4 vertices How many lines of symmetry? 4 lines of symmetry 90 90 How many interior angles? 4 interior angles What does each interior angle measure? each interior angle is 90 What type of angles can you see in this shape? 4 right angles 90 90 How many pairs of parallel lines? 2 pairs of parallel lines How many pairs of perpendicular lines? 4 pairs of perpendicular lines
trapezium How many straight sides? 4 straight sides 2 equal length sides How many vertices? 4 vertices How many lines of symmetry? 1 line of symmetry How many interior angles? 4 interior angles What type of angles can you see in this shape? 2 acute angles 2 obtuse angles How many pairs of parallel lines? 1 pair of parallel lines
rectangle 4 straight sides 2 long sides 2 short sides How many straight sides? How many vertices? 4 vertices 90 90 How many lines of symmetry? 2 lines of symmetry How many interior angles? 4 interior angles What does each interior angle measure? each interior angle is 90 What type of angles can you see in this shape? 4 right angles 90 90 How many pairs of parallel lines? 2 pairs of parallel lines How many pairs of perpendicular lines? 4 pairs of perpendicular lines
rhombus 4 straight sides 4 equal length sides How many straight sides? How many vertices? 4 vertices How many lines of symmetry? 2 lines of symmetry How many interior angles? 4 interior angles How many pairs of interior angles? 2 pairs of interior angles What type of angles can you see in this shape? 2 acute angles 2 obtuse angles How many pairs of parallel lines? 2 pairs of parallel lines
regular pentagon How many straight sides? 5 straight sides How many vertices? 5 vertices How many lines of symmetry? 5 lines of symmetry How many interior angles? 5 interior angles What type of angles can you see in this shape? 5 obtuse angles How many pairs of parallel lines? 0 pairs of parallel lines
regular hexagon How many straight sides? 6 straight sides How many vertices? 6 vertices How many lines of symmetry? 6 lines of symmetry How many interior angles? 6 interior angles What type of angles can you see in this shape? 6 obtuse angles How many pairs of parallel lines? 3 pairs of parallel lines
regular heptagon How many straight sides? 7 straight sides How many vertices? 7 vertices How many lines of symmetry? 7 lines of symmetry How many interior angles? 7 interior angles What type of angles can you see in this shape? 7 obtuse angles How many pairs of parallel lines? 0 pairs of parallel lines
regular octagon How many straight sides? 8 straight sides How many vertices? 8 vertices How many lines of symmetry? 8 lines of symmetry How many interior angles? 8 interior angles What type of angles can you see in this shape? 8 obtuse angles How many pairs of parallel lines? 4 pairs of parallel lines
regular nonagon How many straight sides? 9 straight sides How many vertices? 9 vertices How many lines of symmetry? 9 lines of symmetry How many interior angles? 9 interior angles What type of angles can you see in this shape? 9 obtuse angles How many pairs of parallel lines? 0 pairs of parallel lines
regular decagon How many straight sides? 10 straight sides How many vertices? 10 vertices How many lines of symmetry? 10 lines of symmetry How many interior angles? 10 interior angles What type of angles can you see in this shape? 10 obtuse angles How many pairs of parallel lines? 5 pairs of parallel lines
