Question

Tolong di bantu yaaa ..

Answer 1

A)panjang busur= 72°/360° × (2×3,14×20)
panjang busur=1/5×125,6
panjang busur=25,12cm

b)luas juring= 72°/360° × (3,14×20×20)
luas juring= 1/5 × 1256
luas juring= 251,2 cm2

Answer 2

P.busur=alfa/360×kel lingkaran
=72/360×2.3,14.20
=25,12
L.juring=alfa/360×luas lingkaran
=72/360×3,14.20.20
=251,2