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Measurement · Grade 4

Measuring and Drawing Angles Worksheets

Put the protractor center on the vertex and read from the zero that matches the starting arm.

4 problemsAnswer key includedFree printableA4 & US Letter
Generate & printSee the worked example

Start at the vertex

The vertex is where the two arms meet. Place the center mark of a protractor on that point. Align its zero line with one arm before reading the scale. Bring a physical protractor and ruler; this worksheet does not include a printed protractor.

Choose the correct scale

Many protractors show two scales. Follow the one that starts at zero on the aligned arm. Read where the other arm crosses that scale. An angle smaller than a right angle should give a reading below 90°, not the larger number on the opposite scale.

Estimate, align, read, check.

First decide whether the opening is smaller than, equal to, or larger than a right angle. Then place the tool carefully and compare the reading with that estimate.

The opening matters, not arm length

A longer arm does not make a larger angle. The two arms on an original drawing may have different lengths. If an arm is too short to reach your protractor scale, extend it straight with a ruler without changing its direction.

Draw a requested angle

Draw a straight starting arm and mark its vertex. Place the protractor center at the vertex and align zero with that arm. Mark the requested degree value, remove the protractor, and use a ruler to connect the vertex to the mark. Measure the completed opening again.

If a child reads 150° instead of 30°: compare the drawing with a right angle. An opening clearly smaller than 90° cannot measure 150°. Find the zero on the starting arm and follow that same scale.

Check a drawing, not just its label

Writing the requested degree number beside a drawing does not show that the angle is accurate. Use the tool to check the opening. Allow small pencil and alignment differences and help the child adjust a misplaced vertex or mark.

About this practice

Each sheet reuses two measurement tasks and two drawing tasks. The original bank uses 30°, 45°, 60°, 90°, 120°, 135°, and 150°. Values differ within each pair, but a particular angle or an acute/obtuse balance is not guaranteed.

The supplied diagrams retain their original proportions. Print without stretching the image in one direction. The answer key gives requested-angle guidance for drawing tasks, not completed drawings. Reflex angles, full turns, and angle addition are not assessed here.

Make a practice set

Choose what to print. Selecting both shows the answer key on screen and prints the questions followed by the answers.

Print materials

After the practice

Ask how the child chose the correct scale and checked the opening against a right angle.

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More about measurement · Grade 4 worksheets

Grade 4 selected skill connection: 4.MD.C.6. See the Common Core grade guidance. This worksheet does not cover every requirement in the standard.