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More Lessons for High School Regents Exam

Math Worksheets

High School Math based on the topics required for the Regents Exam conducted by NYSED.

**What is the Heron’s Formula?**

The Heron’s Formula is used to determine the area of a triangle when given the lengths of the sides.

Given that the length of the sides of the triangle is a, b and c.

Let s = (a + b + c)/2

Area of triangle = √(s(s-a)(s-b)(s-c))

The following diagram shows the Heron’s formula to find the area of a triangle. Scroll down the page for more examples and solutions on how to use the Heron’s Formula.

**Heron’s Formula**

Using Heron’s Formula to determine the area of a triangle while only knowing the lengths of the sides.

**Using Heron formula**

Find the area of a triangle using Heron formula

**Heron’s Formula**

This video explains how to determine the area of a triangle given the length of the three sides.

**Derivation or Proof of Heron’s Formula**

This video will help you to derive Heron’s Formula to find the Area of Oblique Triangles using three sides

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