Olympiad Test: Visualising Solid Shapes - 1 - Class 7 MCQ

Length of cuboid will be 2+2=4cm
Height of cuboid =2cm
breath of cuboid=2cm

Vertical cut means a perpendicular cut. A perpendicular cut will give the same shape as the side face of the brick. So its rectangular.

A cuboid is a three-dimensional shape.

Key characteristics of a cuboid include:

• It has length, width, and height.
• All faces are rectangles.
• It has 12 edges, 8 vertices, and 6 faces.

In contrast to a 2-D shape, which only has length and width, a cuboid is defined in three dimensions. This makes it a solid object that occupies space. Common examples of cuboids include:

• Boxes
• Bricks
• Books

Thus, a cuboid is clearly a 3-D shape and not a 2-D figure.

3d shapes are the shapes having 3 dimensions. A cube has length=breadth=height. So the cube is a 3d shape.

EFGH, ABCD, BCGF, EHAD, HGCD and ABFE are the rectangular faces of the rectangular cuboid.
Thus, a rectangular cuboid has 6 rectangular faces.

A cuboid has 12 edges. 4 edges on the top rectangles, 4 edges on bottom rectangle and 4 edges join both top and bottom.

In a cuboid there are 4 vertices in front square and 4 vertices in square which is behind it. So total vertices are 8.

The number of linear faces of a cylinder is 2.

• A cylinder has two circular bases.
• It also has a curved surface that wraps around the sides.
• Thus, only the bases count as linear faces.

In summary, a cylinder has a total of two linear faces, which are the top and bottom circular surfaces.

A cube has six distinct faces.

• Each face is a square.
• The faces meet at edges and corners.
• In total, there are six faces on a cube.

Understanding the structure of a cube helps in various fields such as geometry and architecture. The six faces are crucial for calculating surface area and visualising three-dimensional shapes.

A cone has one circular face, which is the base of the cone, and one pointed face, which is the tip of the cone.

Therefore, the number of faces of a cone is 2.