Question

Bantu jawab no 25 ya.....

Answer 1

Busur lingkaran
b = 120/360 x 2 x π x r
   = 1/3 x 2 x 22/7 x 21
   = 2 x 22/7 x 7
   = 44 cm
kliling = 47+21+24+24+44+(47-21)
          = 136+26
          = 186 cm