luas lingkaran dengan keliling 88 cm adalah

K = 88 cm
πd = 88 cm
22/7. d = 88 cm
d = 88. 7/22
d = 28 cm

Luas = ¼πd² = ¼.22/7.(28)² = 22/28 (784) = 616 cm²

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Mapel : Matematika
Tentang : Bangun Datar
Pertanyaan yg diajukan : 1
Pembahasan :

Diketahui :
- Keliling (K) : 88 cm

Ditanya :
- Luas (L)

Cara :

- Jari - Jari (r) :

[tex]k = 2 \times \pi \times r \\ \\ 88 = 2 \times \frac{22}{7} \times r[/tex]

[tex]88 = \frac{44}{7} \times r \\ \\ r = \frac{88}{ \frac{44}{7} } [/tex]

[tex]r = 88 \times \frac{7}{44} \\ \\ r = 2 \times 7 = 14 \: cm[/tex]

• Luas (L) :

L = π x r²
L = 22/7 x 14 x 14
L = 22 x 2 x 14
L = 44 x 14
L = 616 cm²

Jadi, Luas lingkaran yg memiliki Keliling 88 cm adalah 616 cm²

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Hopefully this is the best for you. And please, MAKE BRAINLY GREAT AGAIN!!!

✚ Heil Manstein! ✚