Question

15. If a line is perpendicular to any one of the two parallel lines, prove that this line will also
be perpendicular to the other parallel line.

16. In the given figure, AB || CD and AD || BC, prove that ZDAB = ZDCB.
17. A transversal intersects two given lines m and n in such a way that
interior angles on the same side of the transversal are equal, then it
is always true that the given lines are parallel ? If not, state the condition under which
the two lines will be parallel.
18. Prove that the two lines that are respectively perpendicular to two intersecting lines
intersect each other.
19. In the given figure, lines AB and CD are parallel and any point P, lies between these lines.
Prove that ZABP + ZCDP = ZDPB.
A
B
C
D
P​

Answer 1

Answer:

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