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Chapter assessment
A. Choose the correct option.
1. Sum of the number on the opposite faces of regular dice is always equal to
(a) 4 (b) 5 (c) 7 (d) 6
2. Name the 3D figure from which a cross-section of a circle can be made.
(a) Cone (b) Cuboid (c) Pyramid (d) Cube
3. Two dimensional representation of 3D shapes is called
(a) Sketch (b) Net (c) Graph (d) Image
4. is a net of
(a) Cone (b) Cube (c) Cylinder (d) Cuboid
5. How many squares are needed to make the net of a cuboid?
(a) 2 (b) 4 (c) 6 (d) 8
6. When a torch is pointed towards one of the vertical edges of a cube, you get a shadow of cube in
the shape of
(a) square (b) rectangle but not a square
(c) circle (d) triangle
7. If three cubes each of edge 3 cm are placed end to end, then the dimensions of resulting solid are:
(a) 9 cm × 3 cm × 3 cm (b) 3 cm × 6 cm × 3 cm
(c) 3 cm × 6 cm × 9 cm (d) 3 cm × 8 cm × 6 cm
B. Assertion and Reason Type Questions.

In the following questions, a statement of Assertion (A) is followed by a statement of Reason (R).
Choose the correct option as:
(a) Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A).

(b) Both Assertion (A) and Reason (R) are true but Reason (R) is not the correct explanation of
Assertion (A).
(c) Assertion (A) is true but Reason (R) is false.
(d) Assertion (A) is false but Reason (R) is true.
1. Assertion (A): A square pyramid is a two-dimensional geometric shape that has a square base and
four triangular bases that are joined at a vertex.

Reason (R): A pyramid with square base have 8 edges.
2. Assertion (A): The side-view of a cone appears as triangle.
Reason (R): A cone is a three-dimensional geometric shape that tapers smoothly from a flat base.

3. Assertion (A): is the net of a cube.

Reason (R): A 2D figures that can be folded to give a 3D geometrical solid is called the net of that
solid.
C. Fill in the blanks:
1. The net of a dice is the same as the net of ...............................
2. The common portion of two adjacent faces of a cuboid is called ...........................
3. The base of a triangular pyramid is a ............................

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