tolong beritau caranya

Diameter = 40 cm
Luas = ¼πd²
= ¼(3,14)(40)(40) = 1256 cm²

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

Diketahui :
- Diameter (d) : 40 cm

Ditanya :
- Luas (L)

Cara :

[tex]l = \frac{1}{4} \times \pi \times d \times d \\ \\ l = \frac{1}{4} \times 3.14 \times 40 \times 40[/tex]

[tex]l = 3.14 \times 10 \times 40 \\ \\ l = 3.14 \times 400[/tex]

[tex]l = 314 \times 4 \\ \\ l = 1.256 \: {cm}^{2} [/tex]

Jadi, Luasnya adalah 1.256 cm². Jawabanmu yg C

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

✚ Heil Manstein! ✚