tolong kak sama proses nya plesee 20 menit lagi dikumpulkan
a. K = πd
= 22/7 × (42×2)
= 22/7 × 84
= 22 × 12
= 264 cm
b. K= 2πr
= 2 × 3,14 × 30
= 188,4 cm
LINGKARAN
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SOLUTION :
Rumus keliling lingkaran
= 2 × π × r
[tex]\\[/tex]
Soal A
Keliling
= 2 × 22/7 × 42
= 2 × 22 × 6
= 44 × 6
= 264 cm
[tex]\\[/tex]
Soal B
Keliling
= 2 × 3,14 × 30
= 3,14 × 60
= 314/100 × 60
= 18840/100
= 188,4 cm
[tex]{ \green{ \boxed{ \boxed{ \sf{ {Answer \: by : AdhidMagelang}}}}}}[/tex]
