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.
What your child will learn
Classify angle types
Identify lines, rays, and segments
Recognize parallel lines
Recognize perpendicular lines
Use angle measures
Common Core standard: 4.G.A.1
Worked example
An angle that measures 125 degrees is obtuse because it is greater than 90 degrees and less than 180 degrees.
Common mistake
Calling a ray a line even though a ray has one endpoint.
Helpful hint
Check endpoints first, then use the angle measure.