Page 88 - Viva

Top Tips

• Triangle, square and rectangle are made up of straight lines.
• Circle and oval are made up of curved lines.

Solids
A shape that has length, breadth and height is called a solid or three-dimensional or 3D

shape.
Let’s study some terms related to solids or 3D shapes. Vertex

• The face of a solid is its flat surface.
• The edge of a solid is the side where two faces meet. Face
Edge
• The vertex of a solid is the point where two edges meet.

Let’s learn about the common solids that we see in our daily life.
Vertex

Cube

• It is a solid made up of 6 flat square-shaped faces.
• It consists of 12 straight edges and 8 vertices.

Face
Vertex

Cuboid Cube Edge
• It is a solid made up of 6 flat faces. Four of
them are always rectangular. The other two

Face may be rectangular or square in shape.
• The opposite faces of a cuboid are equal.
Cuboid • It consists of 12 straight edges and 8 vertices.
Edge

Sphere

• It is a solid made up of 1 curved face. It has no Curved Face/Surface
flat face.

• It has no edge or vertex.
Sphere

Edge
Flat
surface Cylinder
• It is a solid made up of 2 flat faces and 1 curved face.

Curved • It has 2 curved edges.
surface • It has no vertex.
Cylinder

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