Respuesta :

Answer:

20

Step-by-step explanation:

Answer:

100 m

Step-by-step explanation:

If you cut off the triangle you have a 9 by 8 rectangle and that gives you 72 meters and when multiply 4 by 9 (4 being the height at the middle top to the part we "cut off") you get 28. 72+28 is 100 meters.