Topics like Triangles can be crucial to a Class 9 student's understanding of Math. In order to make the best of your preparation time for a CBSE Class 9 Math exam, students should have access to the most comprehensive study notes. Here, you will find our study material for class 9 Triangles extremely helpful. The effectiveness of our study module for topics like Triangles in Class 9 can be seen in the fact that it is supported by AV and illustrated graphics, which are considered the most useful tools for learning. Join now to explore more!
Triangles Class 9 Math Study Material
I am sure each one of you knows what a triangle is?
But have you ever seen structures in real life which is made of triangles or which uses triangles to form a part or other?
Let me show you some such figures.
This is a curved dome, which has many triangles joined side by side.
This is a pyramid of Egypt, which has four triangular faces.
Login here to study Triangles chapter in detail with videos and animations.
Triangles Chapter NCERT Solutions
Question 1:
In an isosceles triangle ABC, with AB = AC, the bisectors of ∠B and ∠C intersect each other at O. Join A to O. Show that:
(i) OB = OC (ii) AO bisects ∠A
Question 2:
ABC is a right angled triangle in which ∠A = 90º and AB = AC. Find ∠B and ∠C.
Question 3:
Show that the angles of an equilateral triangle are 60º each.
Question 4:
AD is an altitude of an isosceles triangles ABC in which AB = AC. Show that
(i) AD bisects BC (ii) AD bisects ∠A.
Question 5:
BE and CF are two equal altitudes of a triangle ABC. Using RHS congruence rule, prove that the triangle ABC is isosceles.
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Important Questions and Answers for Triangles Class 10 Math
This is a curved dome, which has many triangles joined side by side.
This is a pyramid of Egypt, which has four triangular faces.
Login here to study Triangles chapter in detail with videos and animations.
