What are shapes?

Captain Mahari: Today we're going on a shape's treasure hunt. Everyone take one of these to help you.

Sai: I found the shape already Captain. This tablet is a rectangle.

Captain Mahari: Correct Sai. Let's see which 2D shapes we can find.

Anya: Look! Look! I can see a shape. My sandwich is a triangle.

Captain Mahari: Well done, Anya.

Fin: I've got one, circle.

Anya: And look this window is a square.

Fin: Is this a square, too?

Captain Mahari: Not quite, but it does have a square on every side. Does anyone know this 3D shape?

Sai: A cube.

Fin: Laika we're too busy to play now.

Anya: Wait Fin, Laika's brought us another 3D shape. A sphere.

Fin: Cool.

Sai: Hey look. The moon must be a sphere, too.

Cadets: Oh whoa!