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🧩 Making and Sorting Shapes

Build shapes from sticks and lines, join little shapes into big ones, then sort them into groups by their sides and corners!

lessons

~20 min

to learn

🔢 Math

subject

Ages 6–12

level

Start the course →

What you’ll learn

Making ShapesMake 2D shapes from sticks and lines and combine small shapes into bigger ones.You can build shapes using straight sticks or by drawing straight lines: 3 for a triangle, 4 for a square or rectangle. Drawing a square means making 4 straight sides and turning 4 corners. Little shapes join into bigger ones too — two matching triangles make a square, and two squares make a rectangle.
Sorting ShapesSort shapes into groups by number of sides, corners, and curved-or-straight edges.Sorting means grouping things by a rule. You can sort shapes by their number of sides, putting triangles in the 3-side group and squares in the 4-side group. You can also sort by whether the edges are curved or straight, or compare groups by their corners: circles have 0, triangles have 3, and squares have 4.

Questions this course answers

How many straight sticks do you need to build a triangle?

A triangle has 3 straight sides, so it needs 3 sticks.

When you draw a square, how many corners do you turn?

A square has 4 corners, so you turn 4 times as you draw it.

You join two matching triangles together. What new shape can you make?

Two matching triangles fit together to make a square.

What does it mean to SORT shapes?

Sorting means putting things into groups using a rule, like number of sides.

If you sort by number of sides, which group does a rectangle join?

A rectangle has 4 sides, so it joins the 4-side group with squares.

You sort by curved or straight sides. Where does a circle go?

A circle is all curve with no straight sides, so it goes in the curved group.

Grounded in trusted sources

PBS Kids — shapes and geometry
Khan Academy Kids
Britannica Kids
National Council of Teachers of Mathematics

Every Wunder lesson is built from real, reputable sources — never invented.

Related Math courses

🔷All About 2D and 3D Shapes 🧩Building and Combining Shapes 🔢Mean, Median, Mode, and Range 📐Measuring and Comparing Lengths 📐Measuring and Drawing Angles 🥤Measuring How Much Containers Hold 🍰Mixed Numbers and Improper Fractions 📊Modeling Problems with Diagrams and Equations

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