Question

6. show in figure angle A is 20°,B and C are 80°
of each of the angles in the adjacent figure.
(Hint: Sum of three angles of a A = 180°.)​

Answer 1

Answer:

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Dobereiner's triads were groups of elements with similar properties that were identified by the German chemist Johann Wolfgang Dobereiner. He observed that groups of three elements (triads) could be formed in which all the elements shared similar physical and chemical properties.

Answer 2

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