document.write( "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. \n" ); document.write( "

Algebra.Com's Answer #716847 by Fombitz(32388) $\"\"$ $\"About$

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Use the law of cosines to find the missing side,
\n" ); document.write( " $\"a%5E2=b%5E2%2Bc%5E2-2bc%2Acos%28A%29\"$
\n" ); document.write( " $\"a%5E2=90%5E2%2B130%5E2-2%2890%29%28130%29cos%2870%29\"$
\n" ); document.write( "Work that out to find the missing side $\"a\"$ and then,
\n" ); document.write( " $\"L=90%2B130%2Ba\"$
\n" ); document.write( " $\"L=220%2Ba\"$
\n" ); document.write( " \n" ); document.write( "

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