SME
Grade 4 Math · Problem type
Lines, line segments and rays
Use this for “Is it a line, a line segment or a ray?”
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What is it?
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Assumptions
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A point is one exact spot.
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A line goes on forever both ways. A line segment has two endpoints.
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A ray has one endpoint and goes on forever one way.
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Related lessons
Lines, angles, shapes and symmetry
Main lesson
Line symmetry
Use this for “How many lines of symmetry does the shape have?”
Classify triangles and quadrilaterals
Use this to sort triangles and four-sided shapes by right angles and parallel sides.
Classify angles
Use this for “Is the angle acute, right or obtuse?”