Измерь стороны и вычесли периметр фигур.

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Ludwig van beethoven (german: ludwig van beethoven, baptized 17 december 1770 , bonn, westphalia - march 26, 1827 , vienna , austria archduchy ) - german composer and pianist, a representative of " the viennese classical school." beethoven   a key figure in western classical music , between classicism and romanticism , one of the most respected and performed composers in the world. he wrote in all existed in his time of genres, including opera , music for dramatic productions , choral works . the most significant of his legacy are considered instrumental works : piano , violin and cello sonatas , concertos for piano, violin , quartets , overtures and symphonies . beethoven's creativity has had a significant impact on the symphony xix and xx centuries .

  1.they were happy to get the invitation letter, weren't they?                                 2.yesterday your friends went to the cinema, didn't they?                                     3.the group of students won't stay in the hotel, will they?                                     4.his collection of stamps was the best, wasn't it?                                                 5.head teacher didn't write the letter, did he/she?                                                 6.we  can arrange a date and time right now, can't we?