4.GM.1.1
Identify points, lines, line segments, rays, angles, endpoints, and parallel and perpendicular lines in various models.
Khan Academy ResourcesLines, line segments, and rays reviewAngle basics reviewQuadrilaterals reviewParallel and perpendicular lines reviewAngle types reviewIdentify points, lines, line segments, rays, and anglesRecognize angles in figuresName anglesIdentify parallel and perpendicular linesAngle basicsLines, line segments, & raysAngles: introductionParallel & perpendicular linesTerms & labels in geometryRecognizing anglesNaming anglesClassifying shapes by line and angles typesParallel & perpendicular lines introDrawing parallel line segments

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