Question

HOLA, BRAINLIAN :-P



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Let s denote the semi-perimeter of a triangle ABC in which BC = a, CA = b, AB = c. If a circle touches the sides BC, CA, AB at D, E, F, respectively, prove that BD = s – b.




(NEED PROPER EXPLATION ANSWER)​

Answer 1

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AC = AB

(Please refer to the above attachment.)

Thank you!

Answer 2

Answer:

Baking soda or sodium hydrogen carbonate produces sodium carbonate upon heating and further produces washing soda along with carbon dioxide and water, on recrystallization. The chemical formula for this is as follows:

2NaHCO3 heating  Na2CO3 + CO2 + H2O

Sodium carbonate produces baking soda upon heating and this sodium carbonate crystallizes in aqueous solution to produce washing soda.

Na2CO3 + 10H2O  hearing  Na2CO3 . 10H2O

Hence Na2CO3 . 10H2O is the chemical formula for washing soda.