Step-by-step explanation:
First you need to find the semi perimeter (s) and apply the formula of the triangle and you will get your answer
1.772453850905516027298167...
Perimeter is the sum of all outside dimensions.
Solve for x first:
12 + x+7 + x+2 + 5 + x +4 + x + 4 = 42
Combine like terms:
4x + 34 = 42
Subtract 34 from both sides:
4x = 8
Divide both sides by 4:
X = 2
Now solve for EF by replacing x:
EF =. X + 7 = 2 + 7 = 9 feet.
Answer:
84
Step-by-step explanation:
Take 12 x 7 then do the answer over 1 to get the total