Actually it IS. perpendicular lines have opposite reciprocal slopes and parallel lines have the same slope.
intersecting lines are alike because perpendicular lines have to intersect to be perpendicular. 2: They are the same because they touch another line so they are the same.
If they have the same slope but different y intercepts then they are parallel
Yes, parallel lines have the same slope.
Parallel lines have the same slope.
No but if the two lines are parallel then they will have the same slope.
No, lines have the same slope if and only if they are parallel to each other.
Two lines with the same slope are parallel.
Actually it IS. perpendicular lines have opposite reciprocal slopes and parallel lines have the same slope.
The slope of parallel lines are the same, but the slope of perpendicular lines are negative reciprocals of each other.
No because two lines with the same slope but with different y intercepts are parallel lines. Perpendicular lines meet each other at right angles.
The straight line equation is y = mx + b. If they do not cross and have the same slope they are parallel; if they cross and the slope (m) of one of them is the negative inverse slope of the other (-1/m) they are perpendicular. Otherwise they are neither
If the slope of the equations are the same then they are parallel If the slope of the equations are minus reciprocal then they are perpendicular If the slope of the equations are different then they are neither
Two lines are parallel if and only if they have the same slope. Two lines are perpendicular if the product of their slopes is -1. If neither of these conditions are met, the lines are nether parallel, or perpendicular.
No because two lines with the same slope but with different y intercepts are parallel lines. Perpendicular lines meet each other at right angles.
Parallel lines
That depends on the specific situation. You may want to measure angles (perpendicular lines are at a right angle, i.e., 90°). If you have equations for line, write them in the slope-intercept form. Parallel lines have the same slope. If lines are perpendicular, the product of their slopes is -1.