Answer:
180
Step-by-step explanation:
A+B+C=180. sum of interior angles of a triangle
Given:
Height of man = 6 ft
Height of man's shadow = 11 feet
Height of building's shadow = 139 feet
To find:
The height of the building.
Solution:
We know that the heights of the objects and there shadows are always proportional.

Let x be the height of the building.

Multiply both sides by 139.




Therefore, the building is 75.8 feet long.
8.77 x 10^1 i believe but would double check
Answer:
.
Step-by-step explanation:
I think the answer is 78 because more usually mean addition so 57+21=78