Penjelasan dengan langkah-langkah:
A) Panjang Busur AB
rumus panjang busur:
a°/360°×2×phi×r
maka,
45/360×2×3,14×5 = 3,925 cm
B) Luas juring aob
rumus luas juring:
a°/360°×phi×r²
45/360×3,14×5×5 = 9,8 cm²
C) Luas tembereng BOC
di gambar
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Penjelasan dengan langkah-langkah:
A) Panjang Busur AB
rumus panjang busur:
a°/360°×2×phi×r
maka,
45/360×2×3,14×5 = 3,925 cm
B) Luas juring aob
rumus luas juring:
a°/360°×phi×r²
maka,
45/360×3,14×5×5 = 9,8 cm²
C) Luas tembereng BOC
di gambar