Parallel and Intersecting Lines | IT

Question 7

Are line segments ST\text{ST} and UV\text{UV} likely to meet if they are extended?

Question diagram 1
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Solution
Understand the Question
  • Parallel lines remain at a constant distance from each other and never meet, no matter how far they are extended.
  • Intersecting lines are lines that are not parallel; they will eventually cross each other at a single point when extended.
  • To determine if line segments ST\text{ST} and UV\text{UV} will meet, we observe whether they are parallel or inclined toward each other.

Step 1 · Properties of Parallel and Intersecting Lines

Parallel lines always maintain a constant distance apart and never meet. Non-parallel lines in the same plane will always intersect when extended.Diagram 1

Step 2 · Examine Line Segments ST and UV

Diagram 2

Observing the line segments ST\text{ST} and UV\text{UV}:

  • The distance between the segments is not constant.
  • The two segments are not parallel and are angled toward each other.

Therefore, if line segments ST\text{ST} and UV\text{UV} are extended, they will meet at a point.

Answer

Yes, line segments ST\text{ST} and UV\text{UV} are likely to meet because they are not parallel.

Common Mistakes
  • Assuming Segments are Parallel: Thinking line segments will not meet just because they do not intersect within the visible drawn boundary. Always look at whether they converge when extended.
  • Misjudging Constant Distance: Forgetting that parallel lines must have a strictly uniform perpendicular distance everywhere along their length.

More questions in IT

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Q3

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Q5

Can you draw a pair of intersecting lines such that all four angles are equal? Can you figure out what will be the measure of each angle?

Q6

Observe Fig. 5.5 and describe the way the line segments meet or cross each other in each case, with appropriate mathematical words (a point, an endpoint, the midpoint, meet, intersect) and the degree measure of each angle.

Q7

Are line segments ST\text{ST} and UV\text{UV} likely to meet if they are extended?

Q8

Are line segments OP\text{OP} and QR\text{QR} likely to meet if they are extended?

Q9

Name some parallel lines you can spot in your classroom.

Q10

Which pairs of lines appear to be parallel in Fig. 5.6 below?

Q11

Is it possible for all the eight angles to have different measurements? Why, why not?

Q12

What about five different angles — 6, 5, 4, 3 and 2?

Q13

Suppose, we have a transversal intersecting two parallel lines. What can be said about the corresponding angles?

Q14

Context: Activity 5 In Fig. 5.20, draw a transversal tt to the lines ll and mm such that one pair of corresponding angles is equal. You can measure the angles with a protractor.

Q. Are you finding it hard to draw a transversal such that the corresponding angles are equal?

Q15

Draw two more parallel lines using the long side of the set square as shown in Fig. 5.22. How do you know these two lines are parallel? Can you check if the corresponding angles are equal?

Q17

Why are lines ll and mm parallel to each other?

Q18

Is there a relation between 3\angle 3 and 6\angle 6? You could try to find the relationship by taking different values for 3\angle 3 and see what 6\angle 6 is. Once you find a relation, try to justify it or prove that this relation holds always.

Q19

There do not seem to be any parallel lines here. Or, are there?

What causes these illusions?

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