Tolong jawab no 2 dan 3 pakai cara ya secepatnya
Jawaban:
2. panjang AB = 45/360 x π x d
= ⅛ x 3,14 x 100
= 39,25 cm
luas juring kecil AOB = 45/360 x π x r²
= ⅛ x 3,14 x 50 x 50
=981,25 cm²
luas juring besar AOB = 315/360 x π x r²
= ⅞ x 3,14 x 50 x 50
= 6868,75 cm²
3. LR = √LM² + MQ² + QR²
= √8² + 12² + 5²
= √64 + 144 + 25
= √223 cm
L. LMOR = LM x MR
= 8 x 13
=104 cm²
V = p x e x t = 5 x 8 x 12
= 460 cm³
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