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Triangles Formulas for Class 9 Maths Chapter 7

  • June 26, 2020
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Triangles Formulas for Class 9 Maths Chapter 7

Are you looking for Triangles formulas or important points that are required to understand Triangles for class 9 maths Chapter 7? You are the right place to get all information about Triangles Class 9 maths chapters 7. Triangles formulas play a vital role in preparing you for the class 9 exam as well as higher studies. Triangles formulas are very helpful for better scores in the exam.  Check Triangles formulas according to class 9:

\[Area\;of\;Isoscele\;Triangle =\frac{1}{2}bh\]
\[Altitude\;of\;an\;Isosceles\;Triangle=\sqrt{a^{2}-\frac{b^{2}}{4}}\]
\[ Perimeter\;of\;Isosceles\;Triangle,P=2\,a+b\]
Where, b = Base , h = Height, a = length of the two equal sides
\[ Area \;of \;an \;Right\;Triangle = \frac{\sqrt{1}}{2}bh\]
\[ Perimeter \;of \;an \;Right \;Triangle = a+b+c\]
\[ semi\;Perimeter \;of \;an \;Right \;Triangle = \frac{a+b+c}{2}\]
where:; b:Base, h:Hypotenuse a: Hight
\[\ Area\;of\;Scalene\;Triangle = \sqrt{s(s-a)(s-b)(s-c)} \]
\[\ Perimeter\;of\;Scalene\;Triangle = a+b+c \]
Where: a, b, c are Side of Scalene Triangle
\[ Area \;of \;an \;Equilateral \;Triangle = \frac{\sqrt{3}}{4}a^{2}\]
\[ Perimeter \;of \;an \;Equilateral \;Triangle = 3a\]
\[ Semi \;Perimeter \;of \;an \;Equilateral \;Triangle = \frac{3a}{2}\]
\[ Height \;of \;an \;Equilateral \;Triangle = \frac{\sqrt{3}}{2}a\]
Where, a:side, h: altitude

Summary of Triangles

We have shared very important formulas for Triangles which helps to score in the class 9 exams. If you have any questions and doubts related to Triangles please let me know through comment or mail as well as social media. When you understand the formulas behind each Triangles topics then it would be easier to solve the most complex problems related to a Triangles too.

Class 9 Maths Formulas By Chapters

NCERT Solutions For Class 9 Maths by Chapters

  • Chapter 1 – Number Systems 
  • Chapter 2 – Polynomials
  • Chapter 3 – Coordinate Geometry
  • Chapter 4 – Linear Equations in Two Variables
  • Chapter 5 – Introduction to Euclids Geometry
  • Chapter 6 – Lines and Angles
  • Chapter 7 – Triangles
  • Chapter 8 – Quadrilaterals
  • Chapter 9 – Areas of Parallelograms and Triangles
  • Chapter 10 – Circles
  • Chapter 11 – Constructions
  • Chapter 12 – Heron’s Formula
  • Chapter 13 – Surface Areas and Volumes
  • Chapter 14 – Statistics
  • Chapter 15 – Probability