2-D shapes

MathematicsGeometryAges 4–6

Recognise and name common 2-D shapes (circles, triangles, rectangles including squares)

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Teaching Table

Set out your lesson

“A 2-D shape is flat. A circle has one continuous curved edge and no corners. A triangle has three straight sides and three corners. A rectangle has four straight sides and four square corners. A square is a special rectangle with four equal sides. A shape keeps its name when it is bigger, smaller, turned, or rotated.”

Bring to the table

Twelve large paper shape cards prepared by the parent
Paper
Crayon or pencil

Full guide and materials

Twelve large paper shape cards prepared by the parent
Paper
Crayon or pencil

Step 1. The parent draws three large triangles in different sizes and orientations, three circles, three non-square rectangles, and three squares. Keep every card larger than the child’s hand.
Step 2. Name one circle, triangle, rectangle, and square together. Trace the curved edge or count straight sides and corners to explain each name.
Step 3. Turn each example sideways or upside down and compare a large and small version. Repeat that size and orientation do not change the shape’s name.
Step 4. Mix the twelve cards. Ask your child to pick out all the triangles, then name the remaining circles, rectangles, and squares.
Quick check. Show a mixed set containing a small circle, a large turned triangle, a tall rectangle, a tilted square, two more triangles in different orientations, and two other shapes. Success means your child names circle, triangle, rectangle, and square despite size or rotation and picks out all three triangles.

Worked example. Turn a triangle so one corner points down. Count three straight sides and three corners: it is still a triangle. Compare a square with a longer rectangle: both are rectangles with four square corners, while the square has four equal sides.

Optional challenge. Ask your child to draw each shape in an unusual size or orientation, then explain why a tilted square is still a square and also a rectangle.

What to notice. Save a short parent note confirming the child named circle, triangle, rectangle, and square when some were turned or resized and selected all the triangles from the mixed set. A photo may show only the large paper cards.

Entire curriculum

1590 concepts · 8 subjects

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Teaching approaches

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Selected Default Gakuva

A 2-D shape is flat. A circle has one continuous curved edge and no corners. A triangle has three straight sides and three corners. A rectangle has four straight sides and four square corners. A square is a special rectangle with four equal sides. A shape keeps its name when it is bigger, smaller, turned, or rotated.

Spend 10 minutes naming large parent-drawn circles, triangles, rectangles, and squares, then turn and resize the drawings and find every triangle in a mixed set.

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Learning resources

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Check understanding

Name a triangle, circle, rectangle, and square when shown them
Identify a shape correctly regardless of its size or orientation
Pick out all the triangles from a mixed set of shapes

“Can your child point to shapes around the house — like a clock, a window, or a pizza — and correctly name whether each is a circle, triangle, rectangle, or square?”

Curriculum record

Type: Conceptual
Subject: Mathematics
Domain: Geometry
Age range: Ages 4–6

Standards

ccss-math:K.G.2uk-nc-2013:Maths/Y1/GPS/1