Question

Bantu no 28

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Answer 1

Verified answer

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K= 88 cm
Ditanya= L?

K= πd
88= 22/7 x d
d= 88/22/7
d= 88 x 7/22
d= 7 x 4
d= 28 cm > r= 14 cm

L= πr²
L= 22/7 x 14 x 14
L= 22 x 2 x 14
L= 44 x 14
L= 616 cm²

Yg C jawabannya.

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Answer 2

Verified answer

Mapel : Matematika
Bab : Bangun Datar

Diketahui :
- Keliling Lingkaran = 88 cm

Ditanya :
- Luas Lingkaran = .....?

Penyelesaian :
- Jari - Jari :
K = 2 × π × r
88 ÷ 2 = 22/7 × r
44 = 22/7r
r = 44 × 7/22
r = 2 × 7
r = 14 cm

- Luas Lingkaran :
L = π × r × r
L = 22/7 × 14 cm × 14 cm
L = 22 × 2 cm × 14 cm
L = 44 cm × 14 cm
L = 616 cm²

Jawaban : C. 616 cm²

Maaf Kalau Salah