Angles, Lines, and Rays
Grade 4 Math Worksheet

Circle the kind of angle: acute, right, obtuse or straight.
- right
- straight
- acute
- obtuse
- obtuse
- straight
- right
- acute
- right
- obtuse
- acute
- straight
- right
- obtuse
- acute
- straight
- straight
- obtuse
- right
- acute
PencilGoGrade 4 · Math · Geometry
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Grade 4 Math Worksheet

Circle the kind of angle: acute, right, obtuse or straight.

Angles, lines, and rays give students the vocabulary for describing geometric figures precisely is a major fourth-grade math step because students now work with larger numbers, multi-step reasoning, and more precise notation. Students may call every straight mark a line, even when one endpoint makes it a ray or two endpoints make it a segment. This worksheet gives short, self-checking questions that rotate through the parts of the skill instead of repeating one template. Students classify angles by measure, distinguish lines from rays and segments, recognize parallel and perpendicular relationships, and use simple angle sums.
Support versions keep the numbers friendlier while preserving the same reasoning. Standard and challenge versions add larger values, closer distractors, or an extra comparison step. Encourage your child to write down the place, operation, or unit before calculating. If an answer is close but does not match the requested place value, fraction denominator, or measurement unit, it is probably the trap answer.
Common Core standard: 4.G.A.1
An angle that measures 125 degrees is obtuse because it is greater than 90 degrees and less than 180 degrees.
Calling a ray a line even though a ray has one endpoint.
Check endpoints first, then use the angle measure.
Calling a ray a line even though a ray has one endpoint.
Check endpoints first, then use the angle measure.
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Similar: Classify Shapes by Lines and Angles · Line Symmetry
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