3D Shapes Explorer

Math · 3D Shapes · Kindergarten, Grades 1–5, and Middle School

À propos de cette simulation

3D Shapes Explorer is an interactive classroom tool for teaching solid shapes and their properties. Students and teachers turn a cube, cuboid, prism, pyramid, cylinder, cone, sphere or one of the five regular solids, then tap the shape to count its faces, edges and vertices together, with numbered labels and a see-through mode for the hidden ones. Each shape shows the 2D shapes that make up its faces, Euler's rule for corners, edges and faces, and a pattern finder for prisms and pyramids with 3 to 12 sides on the base. Further tabs unfold every solid into its nets, work out volume and surface area with the formula and the working shown, and slice the shape to reveal its cross-section.

Ce que les élèves peuvent explorer

Count the faces, edges and vertices of a cube by tapping them, then check the counts with Euler's rule.
Switch on See-through to find the edges and vertices hidden at the back of a shape.
Change the number of sides on a prism or pyramid and spot the pattern in its faces, edges and vertices.
Unfold a cube and find all 11 of its different nets, then unfold a cylinder and a cone.
Fill a cuboid with 1 cm cubes, layer by layer, to see why volume is length times width times height.
Slice a cube from corner to corner and discover that the cross-section is a regular hexagon.
Play Mystery shape: reveal clues about a hidden solid, then guess which one it is.

Objectifs d'apprentissage

1Name common 3D shapes and describe their properties using faces, edges and vertices.
2Identify the 2D shapes that make up the faces of a prism, pyramid or regular solid.
3Recognise and draw nets of cubes, cuboids, prisms and pyramids.
4Calculate the volume and surface area of cuboids, prisms, pyramids, cylinders, cones and spheres.
5Describe the cross-section made by slicing a solid, and use Euler's formula to check a count.

Questions fréquentes des enseignants

Is the 3D Shapes Explorer free to use?

Yes. It runs in any modern browser, including interactive whiteboards, tablets and phones, with no sign-up or download.

Which 3D shapes are included?

Sixteen solids: the cube, cuboid, triangular, pentagonal and hexagonal prisms, triangular, square, pentagonal and hexagonal pyramids, cylinder, cone, sphere, and the five regular (Platonic) solids: tetrahedron, cube, octahedron, dodecahedron and icosahedron. Prisms and pyramids can be changed to have anywhere from 3 to 12 sides on the base.

What are faces, edges and vertices?

A face is a flat surface of a solid, an edge is where two faces meet, and a vertex (plural vertices, also called a corner) is where edges meet. Tap Faces, Edges or Corners, then tap the shape to count them one at a time, or press Count for me.

How do the nets work?

On the Net tab, drag the slider or press Unfold to open the solid out flat. Press Another net to see different valid nets of the same shape. A cube has exactly 11 nets. A sphere has none, because its curved surface cannot be flattened without stretching or tearing.

Can students find volume and surface area with it?

Yes. The Measure tab has a slider for every dimension, labels the lengths on the shape, and shows the formula with the numbers substituted in. A cuboid can also be filled with 1 cm cubes, one layer at a time.

Intégrer cette simulation

Placez-la dans votre ENT, votre blog ou le site de la classe — gratuitement.

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Continuer à explorer

Spin a spinner, flip a coin or roll a die and watch two sets of bars: the chances the shapes predict, and the results you actually got. Ten spins prove nothing; a few hundred and the two are hard to tell apart.

Type any function and see its shape straight away. Plot up to three at once in three colours to compare them, drag the trace point to read a value off a curve, and see where each one crosses zero.

Move m and watch the line tilt; move b and watch it slide. Or drag the two points on the line and read the equation it writes back. A rise-over-run staircase climbs the line so slope becomes something you can count.

Two bodies under gravity trace an ellipse forever and you can write the formula down. Add a third and no such formula exists. Run the figure-eight orbit, nudge one mass, and watch a stable pattern become unpredictable while the total energy stays put.

Two paths start a hair apart and follow the same three equations. Watch them agree, then part onto opposite wings of the butterfly. Drag the start, spin the shape and pull rho down until chaos stops.

Du modèle à la trace écrite

Utilisez une fiche pour recueillir les prédictions, les observations et les explications après l'exploration des élèves.

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