Question

the area of square whose side is 21 cm

Answer 1

Answer:

21*21=441cm²

Step-by-step explanation:

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Answer 2

Answer:

(1) The names of acyclic compounds are obtained by adding the prefix cyclo to the name of the corresponding straight chain hydrocarbons. (2) If two or more alkyl group or other substituent groups are present in the ring , their positions are indicated by arabic numerals 1,2,3,4