CBSE Class 9 Mathematics – Heron’s Formula

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Study Materials

9th

9th - Mathematics

Herons Formula

Chapter Overview

This chapter introduces Heron’s Formula, a method to calculate the area of a triangle when the lengths of all three sides are known. It also extends the application to finding areas of quadrilaterals that can be divided into triangles. The chapter highlights the usefulness of the formula in real-life contexts and geometrical problems where height is not provided.

Important Keywords

  • Heron’s Formula: A formula to calculate the area of a triangle using its three sides.
  • Semi-perimeter (s): Half of the perimeter of the triangle, used in Heron’s Formula.
  • Perimeter: Sum of the lengths of all sides of a triangle or polygon.
  • Scalene Triangle: A triangle with all sides of different lengths.
  • Area: The measure of the surface enclosed by a shape.

Detailed Notes

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