SOLUTION: a triangular-shaped piece of land is fenced in. Two sides of the property are 90ft and 130ft. The included angle between these two sides is 70°0'. The length of fencing required is

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Question 1102205: a triangular-shaped piece of land is fenced in. Two sides of the property are 90ft and 130ft. The included angle between these two sides is 70°0'. The length of fencing required is ______________ ft.
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Use the law of cosines to find the missing side,
a%5E2=b%5E2%2Bc%5E2-2bc%2Acos%28A%29
a%5E2=90%5E2%2B130%5E2-2%2890%29%28130%29cos%2870%29
Work that out to find the missing side a and then,
L=90%2B130%2Ba
L=220%2Ba