• Identifying lines(straight lines) and curves.

• Identifying flat faces of a 3D object.

What will we learn today?

GeometryLine, curve and surface

Things that you need to know.

straight line

curve

Things that you need to know.

straight line

curve

Things that you need to know.

A cylinder has 1 curve surface and 2 flat surfaces.

The blue portion is the curve surface.

Things that you need to know.

A cylinder has 1 curve surface and 2 flat surfaces.

A cube has no curve surface and 6 flat surfaces.

Here’s an example.

Look at the figure below carefully.

How many curve surface(s) can you see?

Look at the figure below carefully.

How many curve surface(s) can you see?

Ans: 1

Moving to the next level.

Look at the flat surface below carefully.

Which figure does it belong to?

A B C D

Look at the flat surface below carefully.

Which figure does it belong to?

A B C D

Are you ready to try out the questions?