Step by step
The question
Question: what shape is the cut, if we slice a cube parallel to the base?
cube, cut parallel to the base
A cross section is the flat face we see when we slice a solid.
cross section = the face of a cut
1 Look at the cut
Here is the cube.
We slice it parallel to the base.
The red face is the cut.
2 Name the shape
Flat, the cut looks like this.
Every face of a cube is a square.
A cut parallel to a face is the same square.
So it is a square.
= cut: a square
Careful!
All the sides of the cut are the same length, like the face.
So it is a square.
Careful: not a rectangle ✗
3 Check
Let's check: a cut parallel to the base has the shape of the base.
So the answer is right!
like the base: square
Let's look back.
First: look at the cut.
Then: name the shape.
Last: check.
Answer
Careful: not a rectangle ✗