# NCERT Mathematics Class 9 Exemplar Ch 5 Introduction to Euclid՚s Geometry Part 1 (For CBSE, ICSE, IAS, NET, NRA 2022)

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**Exercise 5.1**

1. The three steps from solids to points are:

(A) Solids - surfaces - lines - points

(B) Solids - lines - surfaces - points

(C) Lines - points - surfaces - solids

(D) Lines - surfaces - points – solids

Answer: A

2. The number of dimensions, a solid has:

(A) 1

(B) 2

(C) 3

(D) 0

Answer: C

3. The number of dimensions, a surface has:

(A) 1

(B) 2

(C) 3

(D) 0

Answer: B

4. The number of dimension, a point has:

(A) 0

(B) 1

(C) 2

(D) 3

Answer: A

5. Euclid divided his famous treatise “The Elements” into:

(A) 13 chapters

(B) 12 chapters

(C) 11 chapters

(D) 9 chapters

Answer: A

6. The total number of propositions in the Elements are:

(A) 465

(B) 460

(C) 13

(D) 55

Answer: A

7. Boundaries of solids are:

(A) Surfaces

(B) Curves

(C) Lines

(D) Points

Answer: A