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3
A triangle has three straight sides.
Class 2 · English Version · Mathematics
2D and 3D shapes, symmetry and patterns
Describe flat and solid shapes, reflection and a repeating pattern.
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Original Kidemy foundation practice · Read the example, write your answers, then check. This starter is shared across class versions; it is not a complete board-specific lesson or course.
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Learn the idea
A 2D shape is flat. A 3D object takes up space. A line of symmetry divides a shape into matching halves that fit when folded along the line.
Worked example
A square has 4 equal sides. A cube has 6 square faces. A square has 4 lines of symmetry: horizontal, vertical and two diagonals.
- A side of a flat shape and a face of a solid are different.
- Find the repeating part before extending a pattern.
Your written practice
Show your working on paper. Check your answer, then choose Next.
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6
Count top, bottom, front, back, left and right.
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red
The repeating unit is red, blue.
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