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Area of Triangle using Circumcenter and Incenter
Last updated at May 31, 2026 by Teachoo
Circumcircle and Incircle of a Triangle
Class 9
Chapter 6 Class 9 - Measuring Space: Perimeter and Area (Ganita Manjar
- Definition (and Quesitons)
- Perimeter of Different Shapes
- Perimeter of a Circle - C/D Ratio
- Pi is Irrational
- Length of an Arc of a Circle
- Problems, Puzzles, and Paradoxes on Perimeter
- Exercise Set 6.1
- Area of Square & Rectangle
- Area of a Parallelogram
- Area of a Triangle
- Heron's Formula
-
Circumcircle and Incircle of a Triangle
- Brahmagupta’s Formula for the Area of a Cyclic 4-gon
- Squaring a Rectangle
- Exercise Set 6.2
- Area of a circle
- Exercise Set 6.3
- End-of-Chapter Exercises
Transcript
Area of Triangle using Circumcenter and Incenter We are given formulas of Area of the triangle using the radius of the Incircle (r), the radius of the Circumcircle (R), and the lengths of the three sides (a, b, c): Area ∆ ABC = 𝒂𝒃𝒄/𝟒𝑹 Area ∆ ABC = (𝒓(𝒂 + 𝒃 + 𝒄) )/𝟐
