Question

i can get text book of mathematics class 9 PDF herons formula​

Answer 1

Answer:

Heurons formula is chapter 12 in your textbook

Answer 2

Answer:

In geometry, Heron's formula, named after Hero of Alexandria, gives the area of a triangle when the length of all three sides are known. Unlike other triangle area formulae, there is no need to calculate angles or other distances in the triangle first.

sorry bro we can't attach the image of herons formula.

it's in 12 chapter of of your textbook bro

Step-by-step explanation:

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