# NCERT Mathematics Class 9 Exemplar Ch 5 Introduction to Euclid's Geometry Part 2

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8. Boundaries of surfaces are:

(A) Surfaces

(B) Curves

(C) Lines

(D) Points

9. In Indus Valley Civilization (about 3000 B.C.), the bricks used for construction work were having dimensions in the ratio

(A)

(B)

(C)

(D)

10. A pyramid is a solid figure, the base of which is

(A) Only a triangle

(B) Only a square

(C) Only a rectangle

(D) Any polygon

11. The side faces of a pyramid are:

(A) Triangles

(B) Squares

(C) Polygons

(D) Trapeziums

12. It is known that if then . The Euclid’s axiom that illustrates this statement is:

(A) First Axiom

(B) Second Axiom

(C) Third Axiom

(D) Fourth Axiom

13. In ancient India, the shapes of altars used for house hold rituals were:

(A) Squares and circles

(B) Triangles and rectangles

(C) Trapeziums and pyramids

(D) Rectangles and squares