Question

Tolong, pake cara ya!

Answer 1

P Busur AB = 72/360 . 2π.14

                   = 1/5 . 28π <= π = 22/7

                   = 1/5 . 4.22

                   = 1/5 . 88

                   = 17,6 cm

K AOB = 14.2 + 17,6

            = 28+17,6

            = 45,6 cm

Answer 2

busur AOB = 2π(r) (72°/360°)

busur AOB = 2×22/7×14 × 1/5

busur AOB = 2×22×2×/5

busur AOB = 17,6 cm

Kel juring AOB = busur AOB + 2r

Kel juring AOB = 17,6 + 2(14)

Kel juring AOB = 17,6 + 28

Kel juring AOB = 45,6 cm ...C