document.write( "Question 181782: Find the area of the triangle with vertices:
\n" ); document.write( "A (-7,-3)
\n" ); document.write( "B (-7,6) , and
\n" ); document.write( "C (3,-1) \n" ); document.write( "

Algebra.Com's Answer #136557 by ankor@dixie-net.com(22740) $\"\"$ $\"About$

You can put this solution on YOUR website!
Find the area of the triangle with vertices:
\n" ); document.write( "A (-7,-3)
\n" ); document.write( "B (-7,6) , and
\n" ); document.write( "C (3,-1)
\n" ); document.write( ":
\n" ); document.write( "Plot these three coordinates A B C on the graph paper. Also plot point P at -7,-1
\n" ); document.write( ":
\n" ); document.write( "Looking at this you can see two right triangles, PBC and PAC
\n" ); document.write( "It's easy to see height of these triangles = 10, from x = -7 to x = +3
\n" ); document.write( "The base of PBC = 5
\n" ); document.write( "The base of PAC = 2
\n" ); document.write( ":
\n" ); document.write( "Find the area of the larger triangle, subtract the area of the smaller triangle
\n" ); document.write( "that will equal the area of triangle ABC
\n" ); document.write( ":
\n" ); document.write( " $\"1%2F2\"$ *5*10 = 25
\n" ); document.write( " $\"1%2F2\"$ *2*10 = 10
\n" ); document.write( "--------------------
\n" ); document.write( "triangle ABC area = 15
\n" ); document.write( ":
\n" ); document.write( ":
\n" ); document.write( "Did this make sense to you? Let me know. \n" ); document.write( "

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