Lines

Lines

Lines

It goes on and on in two directions.

Drawn (right) is an example of a line.

Notice that the line has an arrow at each end. This means that a line goes on and on toward the directions indicated by the arrows. 

Take note of the two capital letters below the line. These are used to indicate the name of the line. The line, therefore, is called line TF.

• Look at Figure 1 below. Have you noticed the different types of lines as shown by the pairs of lines?

• The lines in Figure 1 are those on each side of T.M. Kalaw St., those on each side of Ayala Blvd. and those on each side of Taft Ave.

• The lines in Figure 1 are those on each side of T.M. Kalaw St., those on each side of Ayala Blvd. and those on each side of Taft Ave.

• The pairs of lines (a), (c) and (d) right are called parallel lines

• The intersecting lines as shown in Figure 3.

• These pairs of lines meet at a certain point called the point of intersection.

• Perpendicular lines as shown in Figure 4. These are pairs of lines that intersect to form right angles.

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• The square drawn at the point of intersection of perpendicular lines represents a right angle

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Let’s Remember

• A line has arrows at both ends to show that it goes on and on toward both directions. It can be identified by using two capital letters.

• ♦ Parallel lines are pairs of lines that will never meet no matter how long they are extended.

• ♦ Intersecting lines are pairs of lines that meet at a certain point called the point of intersection.

• ♦ Perpendicular lines are pairs of lines that form right angles at their point of intersection.