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Cogito

Grade 4 Math · Chapter 7 · Lesson 4

Practice Worksheet

Lines, Rays, and Segments

Three things that all look like a straight line.

10 problems · about 14 minutes · 4.G.A.1

NameDate

Figure — use these to answer the problems

Set the turn to 90 to make the two arms perpendicular.
030609012015018090°
Turn in degrees90
Figure 1

Warm-Up Review

From earlier lessons. Loosen up before the new work.

2 problems

  1. From “Angles Add Together”

    A right angle split into 25 and one more part. How big is that part?

    Answer

  2. From “Naming and Measuring Angles”

    Is 75 degrees acute or obtuse?

    • Acute.
    • Obtuse.

Warm Up

Straightforward practice. Get the method working first.

4 problems

  1. At how many degrees do perpendicular lines cross?

    Answer

  2. Which goes on forever in both directions?

    • A line.
    • A segment.

  3. Which has exactly two end points?

    • A segment.
    • A ray.

  4. Which has one end point and goes on forever?

    • A ray.
    • A line.

Build It Up

The same ideas with more to keep track of.

2 problems

  1. At how many degrees do perpendicular lines cross?

    Answer

  2. Do parallel lines ever meet?

    • No.
    • Yes.

Stretch Yourself

Mixed problems. Work out what kind of question it is before you start.

2 problems

  1. The Tracks

    Railway tracks never meet. What are they called?

    • Parallel.
    • Perpendicular.

  2. The Corner

    Two lines cross at 90 degrees. What are they called?

    • Perpendicular.
    • Parallel.