Question
The legs of a table are parallel to each other. If the angle between leg 1 and the base of the table is 90°, what is the angle between leg 4 and the base of the table?

- 180°
- 90°
- 60°
- 120°
Hint:
In a plane, if a line is perpendicular to one of two parallel lines , then it is perpendicular to the other line also.

The correct answer is: 90°

The legs of the table are parallel to each other.
Leg 1 is perpendicular to the base of the table.
We know that if a transversal is perpendicular to one of two parallel lines, then it is perpendicular to the other.

So, Leg 4 is also perpendicular to base of the table.
Thus, the angle between leg 4 and the base of the table is 90°.
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