tolong bantuin jwb soal itu please

Please, let me answer your question :)
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Mapel : Matematika
Tentang : Bangun Datar
Pertanyaan yg diajukan : 1
Pembahasan :

Diketahui :
- 3/4 Lingkaran
- Luas (L) : 462 cm²

Ditanya :
- Keliling (K)

- Cara :

L = 3/4 x π x r²
462 = 3/4 x 22/7 x r²
462 = 66/28 x r²
r² = 462/66/28
r² = 462 x 28/66
r² = 7 x 28
r = √196
r = 14 cm

K = 3/4 x 2 x π x r
K = 3/4 x 2 x 22/7 x 14
K = 3/4 x 2 x 22 x 2
K = 3/4 x 44 x 2
K = 3 x 11 x 2
K = 33 x 2
K = 66 cm

Jawaban : B

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Hopefully this is the best for you.

MAKE BRAINLY GREAT AGAIN!!!

Heil Manstein!