Q1 of 45 Page 100

Which of the following are models for perpendicular lines-

(a) The adjacent edges of a table top.


(b) The lines of a railway track.


(c) The line segments forming the letter ‘L’.


(d) The letter V.

(a) The adjacent edges of a table top are perpendicular to each-other.


(b) The lines of a railway track are parallel to each-other.


(c) The line segments forming the letter ‘L’ are perpendicular to each-other.


(d) It forms an acute angle as its sides are inclined at a point.


More from this chapter

All 45 →
10

Investigate:

In the given figure, the angle measures 30°. Look at the same figure through a magnifying glass.


Does the angle become larger? Does the size of the angle change?


 11

Measure and classify each angle:







































Angle



Measure



Type



∠AOB





∠AOC





∠BOC





∠DOC





∠DOA





∠DOB




 2

Let be the perpendicular to the line segment. Let and intersect in the point A. What is the measure of ∠PAY?

 3

There are two set-squares in your geometry box. What are the measures of the angles that are formed at their corners? Do they have any angle measure that is common?