1. Geometry
Line, curve and surface
What will we learn today?
• Identifying lines(straight lines)
and curves.
• Identifying flat faces of a
3D object.

2. Things that you need to know.
straight
curve
line

3. Things that you need to know.
straight
curve
line

4. Things that you need to know.
A cylinder has
1 curve surface
and
2 flat surfaces.
The blue portion is the curve surface.

5. Things that you need to know.
A cylinder has
1 curve surface
and
2 flat surfaces.

6. A cube has
no curve surface
and
6 flat surfaces.

7. Here’s an example.

8. Look at the figure below carefully.
How many curve surface(s) can you see?

9. Look at the figure below carefully.
How many curve surface(s) can you see?
Ans: 1

10. Moving to the next level.

11. Look at the flat surface below carefully.
Which figure does it belong to?
A B C D

12. Look at the flat surface below carefully.
Which figure does it belong to?
A B C D

13. Are you ready to
try out the
questions?