Mathematics
Grade9
Easy
Question
The lines in zebra crossing are parallel to each other. The measure of 
is _______.
- 60°
- 70°
- 180°
- 90°
Hint:
If a transversal is perpendicular to one of two parallel lines, then it is perpendicular to the other.
The correct answer is: 90°
If a transversal is perpendicular to one of two parallel lines, then it is perpendicular to the other.
Here, the lines in zebra crossing are parallel to each other and 
1 = 90°.
The transversal which touches all the parallel lines is same.
By the transversal line property : If a transversal is perpendicular to one of two parallel lines, then it is perpendicular to the other.
Thus, the measure of is 90°.
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