Jawab:
Cek penjelasan
Penjelasan dengan langkah-langkah:
8. 90/360 x (2 x 22/7 x 28 cm) = 44 cm (B)
9. Sudut OBC = 180-30 = 150. Jadi LOAC = 30/150 x 120 = 24 cm² (A)
10. Diagonal AC = sisi x √2 = √36 = 6 cm
Jari-jari lingkaran = 1/2 diagonal = 3 cm
Keliling = 2 x pi x r = 2 x 3.14 x 3 = 18.84 cm (D)
11. Luas tembereng = Luas Juring - Luas segitiga OAB
= 90/360 x (pi x r²) - 1/2xOBxOA
= 1/4 x 3.14 x (15)² -1/2x15x15
= 64,125 cm² (A)
12. V limas = 1/3 x Luas alas x tinggi limas
=1/3 x (1/2 x 8 x tinggi segitiga) x 32
= 1/3 x (1/2 x 8 x (√(17²-8²))) x 32
= 1/3 x (1/2 x 8 x 15) x 32
= 640 cm² (jawabane kok ga ada, bonus kali)
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Jawab:
Cek penjelasan
Penjelasan dengan langkah-langkah:
8. 90/360 x (2 x 22/7 x 28 cm) = 44 cm (B)
9. Sudut OBC = 180-30 = 150. Jadi
LOAC = 30/150 x 120 = 24 cm² (A)
10. Diagonal AC = sisi x √2 = √36 = 6 cm
Jari-jari lingkaran = 1/2 diagonal = 3 cm
Keliling = 2 x pi x r = 2 x 3.14 x 3 = 18.84 cm (D)
11. Luas tembereng = Luas Juring - Luas segitiga OAB
= 90/360 x (pi x r²) - 1/2xOBxOA
= 1/4 x 3.14 x (15)² -1/2x15x15
= 64,125 cm² (A)
12. V limas = 1/3 x Luas alas x tinggi limas
=1/3 x (1/2 x 8 x tinggi segitiga) x 32
= 1/3 x (1/2 x 8 x (√(17²-8²))) x 32
= 1/3 x (1/2 x 8 x 15) x 32
= 640 cm² (jawabane kok ga ada, bonus kali)