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Find all the examples and after-class exercises of inverse proportional function in the second volume of the eighth grade mathematics book published by Jiangsu Education Press.
(1) Let the internal angle be x degrees, and we can know that x = 4 (180-x) 305x = 750x = 150 degrees, and the internal angle is150 degrees.
(2) Let the number of edges be n (n-2)180/n =12, and you can quote n-2 = 10 (please be sure to choose me as the best answer! ! ! Kneel down, I really need it! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! )