# Basic Geometrical Concepts

Here we will recall about the basic geometrical concepts.

Basic Geometrical Concepts:

Axiom: It is a proposition that is not proved but considered to be self-evident or subject to necessary decision. Its truth is taken for granted and serves as a starting point for deducing and concluding other truths.

For Example:

Whole is greater than the part.

Things that are equal to same thing are equal to one another.

Statement: It is a question that is definitely true or definitely false.

For Example:

Every triangle has three sides. This statement is true.

No prime number is even. This statement is false.

Theorem: A formula that is provable without any further assumption is called a theorem. A theorem can be deduced from previously accepted statements such as axiom.

For Example:

In a right angled triangle, the sum of the squares of two sides is equal to the square of the longest side.

Corollary: Result that is trivial or self-evident from a theorem is known as a corollary. Corollary is simply something which we can prove from some other theorem.

For Example:

Theorem: The sum of interior angles of a triangle is 180°.

Its corollary: The sum of interior angles of a quadrilateral is 360°.

Lines and Angles

Fundamental Geometrical Concepts

Angles

Classification of Angles

Related Angles

Some Geometric Terms and Results

Complementary Angles

Supplementary Angles

Complementary and Supplementary Angles

Linear Pair of Angles

Vertically Opposite Angles

Parallel Lines

Transversal Line

Parallel and Transversal Lines

Didn't find what you were looking for? Or want to know more information about Math Only Math. Use this Google Search to find what you need.

## Recent Articles

1. ### Adding 1-Digit Number | Understand the Concept one Digit Number

Sep 17, 24 02:25 AM

Understand the concept of adding 1-digit number with the help of objects as well as numbers.

2. ### Counting Before, After and Between Numbers up to 10 | Number Counting

Sep 17, 24 01:47 AM

Counting before, after and between numbers up to 10 improves the child’s counting skills.

3. ### Worksheet on Three-digit Numbers | Write the Missing Numbers | Pattern

Sep 17, 24 12:10 AM

Practice the questions given in worksheet on three-digit numbers. The questions are based on writing the missing number in the correct order, patterns, 3-digit number in words, number names in figures…

4. ### Arranging Numbers | Ascending Order | Descending Order |Compare Digits

Sep 16, 24 11:24 PM

We know, while arranging numbers from the smallest number to the largest number, then the numbers are arranged in ascending order. Vice-versa while arranging numbers from the largest number to the sma…