Add all the numbers of the triangle and then divide them by the sides
Each means to multiply I dont know if thats the word you are asking to us to define
The answer is 6.55, because 42.6-(13.45+9.5)=19.65, and 19.65/3=6.55.
The area the goat can graze is 1/2π(50)²= 1250π sq. feet
The rope length is 50 feet again, thus the results are the same.
1/2π(50)²= 1250π sq. feet