Предмет: Математика, автор: bezumiya07

Помогите будьте добры, 6 класс

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Ответы

Автор ответа: Тапч
0

313.

б) R=8/2=4

S=πR²=3,14×4²=50,24

в)R=4/2=2

S=πR²=3,14×2²=12,56

г) R=6/2=3

S=πR²=3,14×3²=28,26

314.

Длина большей полуокружности=2п×a/2=π×a

Сумма 2-х малых полуокружностей =2×π×a/2=π×a

Длина всей линии = п×a+π×a = 2π×a

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