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Cogito

Grade 4 Math · Chapter 7 · Lesson 1

Practice Worksheet

An Angle Is a Turn

Longer arms do not make a bigger angle.

10 problems · about 14 minutes · 4.MD.C.5

NameDate

Figure — use these to answer the problems

Change the turn. Then change the arm length and watch the measure.
030609012015018045°
Turn in degrees45
Arm length110
Figure 1

Warm-Up Review

From earlier lessons. Loosen up before the new work.

2 problems

  1. From “Decimals and Money”

    How many cents is $0.35?

    Answer

  2. From “Adding Tenths and Hundredths”

    7/10 + 15/100. How many hundredths?

    Answer

Warm Up

Straightforward practice. Get the method working first.

4 problems

  1. How many degrees is a half turn?

    Answer

  2. What is an angle?

    • The amount of turn between two lines.
    • How long the two lines are.

  3. How many degrees in a half turn?

    Answer

  4. How many right angles in a full turn?

    Answer

Build It Up

The same ideas with more to keep track of.

2 problems

  1. Does making the arms longer change the angle?

    • No. The turn is the same.
    • Yes.

  2. How many degrees in three quarters of a turn?

    Answer

Stretch Yourself

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

2 problems

  1. The Corner

    How many degrees is a right angle?

    Answerdegrees

  2. The Full Turn

    How many degrees in a full turn all the way round?

    Answerdegrees