Tolong bantu aku!!!!!!!!!!!

= PQ + QR + RS + ST + TU + UV + VW + WP
= 20 + 20 + 20 + 1/2 K + 20 + 20 + 1/2 K
= (6 x 2r) + (2 x 1/2 k)
= 12 r + 2 pi r
= 12 x 10 + 2 . 3,14 . 10
= 120 + 62,8 
= 182,8 cm