Предмет: Математика, автор: girlmargo12369

Решите плиз(ЖЕЛАТЕЛЬНО СРОЧНО)

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Ответы

Автор ответа: FCBM

Ответ:

S=1560 см^2 = 15,6 дм^2

P=46 дм

Пошаговое объяснение:

1) P = 164см

a = 30 см

P = 2a + 2b

b = (P-2a)/2 = 52

S = a*b = 30* 52 = 1560 см^2

2) S = 132 дм2

а=11дм

b = 132/11= 12 дм

P = 2(a+b) = 2(11+12) = 46 дм

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