Answer:
30
Step-by-step explanation:
Triangles SOW, SNO and ONW are similar
SO/SN = SW/SO
10/8 = SW/10
SW = 10 × 10/8
SW = 12.5
NW = 12.5 - 8 = 4.5
NW/NO = OW/SO
4.5/6 = OW/10
OW = 7.5
Perimeter = 10 + 12.5 + 7.5 = 30 units
