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CBSE Class 9 Maths Chapter 12 Heron’s Formula Revision Notes

Revision is very important for better conceptual understanding and securing good marks, and for Revision, Revision Notes are always considered the best. Revision Notes can be very beneficial for students to revise all their previously prepared chapters and concepts, especially during the examination times when they have to revise the whole syllabus in a limited time period.

We, at Swiflearn, provides you the best CBSE Class 9 Maths Chapter 12 Heron’s Formula Revision Notes. Free CBSE Class 9 Maths Chapter 12 Revision Notes provided here are prepared by Subject Matter Experts at Swiflearn who have a lot of experience in teaching. CBSE Class 9 Maths Chapter 12 Heron’s Formula Revision Notes are one of the most important pieces of study material that students can use as it will aid them to study better and reduce the level of stress that they face during the hectic year.

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Heron’s Formula

Heron’s formula is a formula that can be used to find the area of a triangle when given its three side lengths. It can be applied to any shape of a triangle, as long as we know its three side lengths.

Area of triangle:- Area = 1⁄2 × base ×height

i) For a right-angle triangle, the two sides containing the right angle are called the base (BC) and height (AB) of the triangle.
ii) For an equilateral triangle, any of the three sides is the base and the perpendicular to the base from the opposite vertex is the height of the triangle.
iii) For an isosceles triangle, the side which is unequal is the base and the perpendicular to it from the opposite vertex is the height of the triangle.

Area of a triangle using Heron’s Formula:-

• Area of a triangle = √s(s − a)(s − b)(s − c)
• a, b, c are the sides of the triangle
• [s = (a + b + c)/2] is the semi-perimeter of the triangle.

CBSE Class 9 Maths Chapter 12 Heron’s Formula Revision Notes PDF

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