Find ( a ) if the line that has these points : (a,-3) and (3,1) is normal with the line that has these points : (a,-3) and (-1,-2) .
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Originally Posted by beq!x Find ( a ) if the line that has these points : (a,-3) and (3,1) is normal with the line that has these points : (a,-3) and (-1,-2) . Get the gradient of each line. Check whether the product of the gradients is equal to -1.
Originally Posted by beq!x Find ( a ) if the line that has these points : (a,-3) and (3,1) is normal with the line that has these points : (a,-3) and (-1,-2) . A line is perpendicular to the other . So the product of their gradients will be equal to -1 , then solve for a.
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