Sort the 2D-shape cards given at the end of the book into three groups according to their sides. Draw the sorted shapes in the space given below. Explain why you sorted your shapes in this way.
Group 1: Shapes with 3 sides (triangles) Equilateral triangle, isosceles triangle, scalene triangle, right triangle.
Group 2: Shapes with 4 sides (quadrilaterals) Square, rectangle, parallelogram, trapezoid, rhombus, kite.
Group 3: Shapes with more than 4 sides Pentagon (5 sides), hexagon (6 sides), heptagon (7 sides), octagon (8 sides).
Explanation: Shapes are sorted by the number of sides because this is a fundamental property that defines the type of polygon.
Explanation
The chapter provides 2D shape cards and asks learners to sort them into three groups based on the number of sides: triangles (3 sides), quadrilaterals (4 sides), and polygons with more than 4 sides.
Solution Steps
Identify all shapes with 3 sides and group them as triangles.
Identify all shapes with 4 sides and group them as quadrilaterals.
Identify all shapes with more than 4 sides and group them separately.
Explain that sorting by number of sides is based on a fundamental property of polygons.