2007-10-01 07:26:10 · 4 answers · asked by britty 1 in Science & Mathematics ➔ Mathematics
because the angle formed between the perpendicular line and the first parallel line will be the same with the second Parallel line by definition. The two lines are Parallel and HAVE to form the same angle because there is no angle difference between the two parallel lines.
2007-10-01 07:29:21 · answer #1 · answered by aero 2 · 0⤊ 0⤋
by definition parallel lines have the same orientation as each other. This means their orientations relative to other objects will be the same. So if one line is oriented perpendicular to a line, the other parallel line must be as well.
2007-10-01 14:31:29 · answer #2 · answered by treefiter 2 · 0⤊ 1⤋
Because two parallel line cut by a third line form congruent corresponding parts. thus if one angle is 90 then all angles are 90.
2007-10-01 14:29:50 · answer #3 · answered by Arin 3 · 0⤊ 1⤋
That's because in Geometry, There is a rule which says 'things equal to the same things are equal to each other.'
2007-10-01 14:43:12 · answer #4 · answered by Jackolantern 7 · 0⤊ 1⤋