MEDIAN AND ISOSCELES TRIANGLES, TRIANGLES BASIC CONCEPTS, GEOMETRY FOR BEGINNERS

Learn Triangles from class 9th chapter 7 and entire NCERT Math from class 9th, 10th, 11th and 12th on our website

In all these videos on Triangles chapter 7 class 9th I have always focused on explaining the basics and then solving the questions. My way of solving question will always refer back to the basics explained previously so that students can make the connect between basics and application of them.
Let’s now start about the Triangles:
In the previous standard we have learned about the Triangle. We know that any closed figure formed by three intersecting lines is called TRIANGLE. In this chapter we will learn more about triangles and its congruency. Any two figure with same shape and size is called to be congruent.

We have many ways to establish congruency between triangles. We will learn all of them step by step through all the separate videos.

In this Triangles chapter from class 9th you will learn about

Triangles basics
Congruence of triangles
Criteria for congruence of triangles
SAS Criteria for congruence of triangles
ASA Criteria for congruence of triangles
AAS Criteria for congruence of triangles
SSS Criteria for congruence of triangles
RHS Criteria for congruence of triangles
Some Properties of Triangles
Inequalities of triangles
Questions from all the topics and exercises.

As per the syllabus, you will learn all the topics in my Triangles Chapter Videos:
Two figures are congruent, if they are of same shape and of same size.
Two circles of same radii are congruent.
two squares of same sides are congruent.
If two triangles ABC and PQR are congruent under the correspondence a to b b to q, then sybbollically, it is expressed as triangle abc is congruent to triangle PQR.

if two angles and the included side of one triangle are equal to two angles and the included side of other triangle, then the two triangles are congruent (AAS congruence rule)
Angles opposite to equal sides of a triangle are equal
sides opposite the equal angles of a triangle are equal
each angles of equilateral triangle is 60 degree
three sides of one triangle is equal to other three sides of other triangle, then they are congruent (SSS congruence rule)
in the two right angle triangles, hypotenuse and one side of the triangle are equal to hypotenuse and one side of other triangle, then the two triangles are congruent (RHS congruence rule)
in a triangle, angle opposite to longer side is larger
in a triangle, side opposite to larger angle is longer
sum of any two sides of a triangle is greater than the third sides.

Class 10 I have: Real Numbers, Polynomials, Quadratic Equations, Coordinate Geometry, Linear Equations in Two Variables, Triangles Similarity, Circle, Introduction to Trigonometry, Application of Trigonometry, Area related to circle, Surface Areas and Volumes, Statistics and Probability

Class 11 I have: Sets, Relations and Functions, Trigonometric Functions, Permutations and Combinations, Linear Inequality, Binomial Theorem, Straight Lines, Conic Sections.

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