Question

Bantuin yaa kak, (?) pake Caranya

Jika luas daerah yg diarsir = 18/7 cm², maka panjang busur AB =
(see pict)

Answer 1

AB = π x r/2
juring LBOA= π/4
segitiga LBOA= /2
LAB= juring LBOA - segitiga LBOA
=π/4 - /2 =18/7
π - 4 = 72/7
22- 14 = 72
= 72/8 = 3
AB = π x r/2 = 22/7 x 3/2 = 33/7 = 4 5/7