Answer:
74.32
Step-by-step explanation:
Add the two together, and you have your answer b/c it's asking for the total length of the line
92
Corner triangle: 1/2 (2 x 2) = 2
4 triangles = 4 x 2 = 8
Octagon + 4 triangles forms a square: 10 x 10 = 100
Octagon: 100 - 8 = 92
