The shape of a brick is a cuboid. A cuboid is a three-dimensional figure with six rectangular faces, where each face is a rectangle. It is also known as a rectangular prism.

Here is an explanation of why a brick is considered a cuboid:

Rectangular Faces:
- A brick has six faces, and each face is a rectangle. These rectangular faces are parallel to each other and have four right angles (90-degree angles). The opposite faces of a brick are congruent, meaning they have the same dimensions.

Equal Edges:
- The edges of a brick are all equal in length. This means that the length of one edge is the same as the length of the opposite edge, the width of one edge is the same as the width of the opposite edge, and the height of one edge is the same as the height of the opposite edge.

Right Angles:
- All the edges of a brick meet at right angles. This means that when two edges of a brick intersect, they form a 90-degree angle.

Identifying the Shape:
- To identify the shape of an object, we look at its attributes such as faces, edges, and angles. In the case of a brick, it has six rectangular faces, equal edges, and right angles at each intersection. These characteristics perfectly match the definition of a cuboid.

Visual Representation:

A visual representation of a cuboid brick can be helpful in understanding its shape. Imagine a rectangular box or a typical brick you see in construction. It has length, width, and height, and all the faces are flat rectangles. The edges are straight and meet at right angles.

Conclusion:
In conclusion, the shape of a brick is a cuboid. It is a three-dimensional figure with six rectangular faces, equal edges, and right angles at each intersection. The attributes of a brick perfectly match the definition of a cuboid, making it the correct answer for this question.

Cuboid