luas setengah lingkaran.....adalah jika berdiameter 70cm...

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

Diketahui :
- Diameter (d) : 70 cm
- Jari - Jari (r) : 70/2 : 35 cm

Ditanya :
- Luas (L) ½ Lingkaran

Cara :

L = ½ x π x r²
L = ½ x 22/7 x 35 x 35
L = ½ x 22 x 5 x 35
L = ½ x 110 x 35
L = 55 x 35
L = 1925 cm²

Jawaban : 1925 cm²

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MAKE BRAINLY GREAT AGAIN!!!

Heil Manstein!

d = 70 cm ⇔ r = 35 cm

Luas 1/2 lingkaran
= 1/2 π r^2
= 1/2 x 22/7 x 35 x 35    (22 : 2 = 11;  35 ; 7 = 5)
= 11 x 35 x 5
= 1.925 cm^2