4th grade measuring angles worksheets

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Measuring angles worksheets for fourth grade print each angle over its own protractor scale: ticks every 5 degrees, labels every 30, and the 0 end switching sides from one angle to the next. One ray rests on 0, every answer lands on a short tick between two tens, and reading the scale carefully is the whole game.

Free printable PDF worksheet, aligned to Common Core 4.MD.C.6.

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The kind of problems you'll get

Read each protractor. Write the angle in degrees. Each tick marks 10 degrees.

  1. One ray starts at 0° and the other crosses the 65° mark on that scale.

    Answer: The angle measures 65°.

Most problems on this sheet sit beside a picture, model or diagram, so this is the worked example the sheet itself prints. The answer key on page two prints the answer under every problem.

Every print pulls a fresh set of problems at this level, so a make-up test or a second sibling never gets the same sheet.

What's on a 4th grade sheet

The sample sheet above has 8 problems. Its answers run from 10 to 150.

Every version prints on US Letter or A4, with its answer key after the problems.

How to teach this

Start every problem with the same question: which ray is on 0? Then count up by tens along the long ticks, touching each one, until the last ten before the second ray, and add 5 for the short tick. When 65 turns into 115, that is the classic wrong-end read. Have your child say whether the angle looks smaller or bigger than a square corner first, then check the answer against that estimate. The estimate-first habit catches nearly every scale mistake.

Watch for: Kids read from the wrong end of the scale and turn 65° into 115°. Start counting from the ray that sits on 0. Kids count every tick as ten. The long ticks are tens, and the short tick between two long ones adds 5.

Common questions about 4th grade measuring angles

Does my child need a real protractor for these sheets?
No. The protractor scale is printed around every angle, so all the practice lands on reading it correctly. That is the hard part of measuring angles anyway, and it transfers straight to the plastic tool.
Why do the answers all end in 5?
Every measure from 15° to 165° sits on the short tick halfway between two labeled tens, so your child reads the scale instead of matching a label. Reading from the wrong end shows up instantly: 65° and 115° are different ticks.

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Aligned to Common Core 4.MD.C.6. Reviewed by the One more sheet team. Content version 240, updated September 2026.

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