bagiamana cara mencari luas juring jika diketahui diameter 14 cm sudut pusat60%
Ghinashoda
Luas juring = (60'/360' x π x r²) + (1/2 x r² x Sin 60') = π/6 x 7² + (1/2 x 7² x (1/2 V3) = 22x 7² + 7²√3 7 x 6 4 = 11 x 7 + 49√3 3 4 = (4x77) + (3 x 49√3) 12 = 308 + 147√3 12 = 46,884 cm²
= π/6 x 7² + (1/2 x 7² x (1/2 V3)
= 22x 7² + 7²√3
7 x 6 4
= 11 x 7 + 49√3
3 4
= (4x77) + (3 x 49√3)
12
= 308 + 147√3
12
= 46,884 cm²