Shapes All Around Us Collage
Exploring 2D Shapes in Our World Grade 4 Mathematics Triangles, Quadrilaterals, and Circles
What Are 2D Shapes?
Flat shapes with length and width Have sides, vertices (corners), and angles Found everywhere in our world Can be classified by their properties
Triangles: Three-Sided Shapes
Always have 3 sides and 3 angles Right triangles have one 90-degree angle Acute triangles have all angles less than 90° Obtuse triangles have one angle greater than 90°
Quadrilaterals: Four-Sided Shapes
All have 4 sides and 4 angles Squares have 4 equal sides and 4 right angles Rectangles have 4 right angles, opposite sides equal Parallelograms have opposite sides parallel and equal
Shape Hunt Activity
Work in groups of 5 students Cut out shapes from magazines Sort shapes by type on poster paper Label each shape and its properties
Shape Detective Challenge
Look at this traffic sign - what shape is it? How many sides does it have? What type of angles can you identify? Is this shape regular or irregular?
Parallel vs. Perpendicular Lines
{"left":"Parallel lines never meet\nAlways stay the same distance apart\nFound in rectangles and squares","right":"Perpendicular lines meet at right angles\nForm 90-degree corners\nCreate squares and rectangles"}
Shapes All Around Us!
Triangles in roof tops and pizza slices Rectangles in doors and books Squares in windows and tiles Circles in wheels and clocks Geometry is everywhere we look!