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Ответ

Ответ дан
arletakozlova

/ - дробная черта

а) S= 1/2 ×b × a

S= 1/2 ×4 × 7 = 14 ( квадратных см)

Ответ: 14 квадратных см.

б) S= 1/2 × a × b

35 дм = 3,5 м

1/2 × 1,2 × 3,5= 2,1 ( квадратных м)

Ответ: 2,1 квадратных м

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