# Introduction To Euclid's Geometry

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| By Tanmay Shankar
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Tanmay Shankar
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• 1.

### The number of dimensions a solid has:

• A.

1

• B.

2

• C.

3

• D.

0

C. 3
Explanation
A solid has three dimensions because it has length, width, and height. These three dimensions allow us to describe the shape and size of a solid object in three-dimensional space. A solid object is not flat like a two-dimensional shape, and it is not just a point like a zero-dimensional object. Therefore, the correct answer is 3.

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• 2.

### Boundaries of solids are:

• A.

Surfaces

• B.

Curves

• C.

Lines

• D.

Points

A. Surfaces
Explanation
The boundaries of solids refer to the outermost layer or surface of the object. They define the shape and form of the solid and separate it from its surroundings. Surfaces are the correct answer because they encompass the entire outer area of the solid, while curves, lines, and points are more specific features that may exist within the solid's boundaries.

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• 3.

### The number of dimension that a point has is:

• A.

0

• B.

1

• C.

2

• D.

3

A. 0
Explanation
A point is a geometric object that has no size, shape, or dimensions. It is considered to be a zero-dimensional object because it does not have any length, width, or height. Therefore, the correct answer is 0, indicating that a point has zero dimensions.

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• 4.

### The first known proof that ‘the circle is bisected by its diameter’ was given by:

• A.

Phythagores

• B.

Thales

• C.

Euclid

• D.

Hypatia

B. Thales
Explanation
Thales is credited with being the first known mathematician to provide a proof for the statement that "the circle is bisected by its diameter." This proof is known as Thales' theorem and states that any diameter of a circle divides the circle into two equal parts. Thales' theorem is considered one of the fundamental principles in geometry and has had a significant impact on the development of mathematics.

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• 5.

### The base of a Pyramid is:

• A.

Only a triangle

• B.

Only a square

• C.

Only a rectangle

• D.

Any polygon

A. Only a triangle
Explanation
A pyramid has a triangular base because it is a three-dimensional shape that tapers to a point at the top. The base of a pyramid provides stability and support for the rest of the structure. A triangle is the simplest polygon with three sides, making it the most suitable shape for the base of a pyramid.

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• 6.

### If x + y =10 then x + y + z = 10 + z. Then the Euclid’s axiom illustrates this statement as:

• A.

First axiom

• B.

Second axiom

• C.

Third axiom|

• D.

Fourth axiom

B. Second axiom
Explanation
The second axiom of Euclid's axioms states that "If equals are added to equals, the wholes are equal." In this case, the statement x + y = 10 implies that the sum of x and y is equal to 10. Adding z to both sides of the equation, we get x + y + z = 10 + z. This aligns with the second axiom, as we are adding the same quantity (z) to both sides of the equation, resulting in the sum being equal on both sides.

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• 7.

### In ancient India, the shapes of altars used for household rituals were:

• A.

Squares and circles

• B.

Triangles and rectangles

• C.

Trapeziums and pyramids

• D.

Rectangles and squares

A. Squares and circles
Explanation
In ancient India, the shapes of altars used for household rituals were squares and circles. These shapes were chosen for their symbolic meanings. The square represents stability, balance, and the four directions, while the circle represents eternity, wholeness, and the divine. The combination of these shapes in the altar design would have been seen as a harmonious representation of the earthly and the divine realms, creating a sacred space for rituals and offerings.

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• 8.

### Greeks emphasized on:

• A.

Public worship

• B.

Household rituals

• C.

Both a and b

• D.

None of a, b and c

A. Public worship
Explanation
The Greeks emphasized on public worship because they believed in the importance of communal rituals and ceremonies. Public worship allowed them to come together as a community and express their devotion to the gods collectively. It was a way for the Greeks to demonstrate their religious beliefs and seek blessings and guidance from the deities. Additionally, public worship also played a role in reinforcing social cohesion and identity within the Greek society.

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• 9.

### ‘Lines are parallel if they do not intersect’ is stated in the form of:

• A.

An axiom

• B.

A definition

• C.

A postulate

• D.

A proof

B. A definition
Explanation
The statement "Lines are parallel if they do not intersect" is stated in the form of a definition. A definition is a statement that explains the meaning of a term or concept. In this case, the definition is explaining what it means for lines to be parallel, stating that if two lines do not intersect, then they are considered parallel.

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• 10.

### The number of interwoven isosceles triangles in Sriyantra (in the Atharvaveda) is:

• A.

7

• B.

8

• C.

9

• D.

10

C. 9
Explanation
The correct answer is 9. The Sriyantra is a sacred geometric diagram used in Hinduism and represents the cosmos. It consists of interlocking triangles, with some triangles being isosceles. To count the number of interwoven isosceles triangles, one needs to carefully examine the pattern formed by the triangles in the Sriyantra. By doing so, it can be determined that there are a total of 9 interwoven isosceles triangles in the Sriyantra.

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• 11.

### For every line ‘l’ and a point P not lying on it, the number of lines that passes through P and parallel to ‘l’ are:

• A.

1

• B.

2

• C.

3

• D.

No line

A. 1
Explanation
The correct answer is 1 because if a line and a point are given, there can only be one line passing through that point and parallel to the given line.

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• 12.

### The total number of propositions in Euclid’s famous treatise “The Elements” are:

• A.

13

• B.

55

• C.

460

• D.

465

D. 465
Explanation
Euclid's famous treatise "The Elements" consists of 465 propositions. These propositions are fundamental statements or theorems in geometry that serve as the building blocks for the rest of the treatise. Each proposition is carefully derived and proven, forming the basis of Euclidean geometry.

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• 13.

### The number of Euclid’s postulates is:

• A.

3

• B.

4

• C.

5

• D.

6

C. 5
Explanation
Euclid's postulates are a set of fundamental assumptions in geometry. The correct answer is 5 because Euclid's postulates consist of five statements that form the basis of Euclidean geometry. These postulates include the existence of a straight line between any two points, the ability to extend a line segment indefinitely, the ability to create a circle with any given center and radius, the existence of right angles, and the parallel postulate. These postulates are essential in building the logical framework of Euclidean geometry.

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• 14.

### If AB = x + 3, BC = 2x and AC = 4x – 5, then for what value of ‘x’, B line on AC:

• A.

2

• B.

3

• C.

5

• D.

8

D. 8
Explanation
If B lies on AC, it means that B is a point on the line segment AC. In order for B to lie on AC, the coordinates of B should satisfy the equation of the line segment AC. The equation of the line segment AC can be written as AB + BC = AC. Substituting the given values, we get (x + 3) + 2x = 4x - 5. Simplifying this equation, we get 3x + 3 = 4x - 5. Solving for x, we find x = 8. Therefore, B lies on AC when x = 8.

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• 15.

### Proved statements based on deductive reasoning, by using postulates and axioms are known as a:

• A.

Statement only

• B.

Proposition only

• C.

Theorem only

• D.

Both Proposition and Theorem

D. Both Proposition and Theorem
Explanation
Proved statements based on deductive reasoning, by using postulates and axioms can be referred to as both propositions and theorems. A proposition is a statement that is proven to be true using logical reasoning, while a theorem is a proposition that has been proven using a specific set of axioms and postulates. Therefore, the correct answer is "Both Proposition and Theorem."

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• Current Version
• Mar 21, 2023
Quiz Edited by
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• Dec 06, 2014
Quiz Created by
Tanmay Shankar

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