4.G.1
Draw points, lines, line segments, rays, angles (right, acute, obtuse), and perpendicular and parallel lines. Identify these in two-dimensional figures.
Khan Academy ResourcesLines, line segments, and rays reviewParallel and perpendicular lines reviewAngle types reviewIdentify points, lines, line segments, rays, and anglesAngle typesBenchmark anglesDraw parallel and perpendicular linesRecognize angles in figuresTypes of angles by measureEstimate angle measuresIdentify parallel and perpendicular linesLines, line segments, & raysParallel & perpendicular linesAcute, right, & obtuse anglesTerms & labels in geometryRecognizing anglesDrawing acute, right and obtuse anglesMeasuring angles with a circular protractorParallel & perpendicular lines introDrawing parallel line segments
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