Flat vs Solid Shapes

Mathematics · Geometry · ages 5-6

Name ______________________ Date ____________

A circle is flat but a ball is solid. Is that right?
Circle one: True False
Which shape is flat?
- circle
- sphere
- cube
- cone
Look at a square. Is it flat or solid?
- Flat
- Solid
- Both flat and solid
A cube is a flat shape.
Circle one: True False
A square is a solid shape. Is that right?
Circle one: True False
Which shape can you draw flat on a page?
- A cube
- A square
- A sphere
Which is a solid shape?
- circle
- cube
- square
- triangle
A coin looks most like which flat shape?
- square
- cube
- circle
- triangle
Tom says a coin is flat because its face is a circle. Is he right?
- Yes, a circle is flat, so a coin is flat
- No, a coin takes up space, so it is solid
- Yes, because coins are thin
Which list has only flat shapes?
- cube, cone, sphere
- circle, cube, square
- sphere, triangle, cone
- circle, square, triangle

Answer key

For grown-ups. Fold this page away before handing over the rest.

True · Right. Circles draw flat, balls hold round.
circle · A circle is flat; the rest are solid.
Flat · A square has no inside space. That makes it a flat shape.
False · A cube is solid. It has space inside, unlike a flat shape.
False · Wrong. A square is flat with 4 sides.
A square · A square can be drawn flat on paper. A cube and a sphere need space to be real.
cube · A cube fills space; the rest are flat.
circle · A coin is round and flat like a circle.
No, a coin takes up space, so it is solid · A coin's face is a flat circle, but the whole coin takes up space. That makes the coin solid.
circle, square, triangle · Circle, square, and triangle are all flat.