4.6.D
Classify two-dimensional figures based on the presence or absence of parallel or perpendicular lines or the presence or absence of angles of a specified size.
Khan Academy ResourcesTypes of triangles reviewQuadrilaterals reviewClassify triangles by anglesClassify triangles by both sides and anglesClassify shapes by line and angle typesQuadrilateral propertiesWorked example: Classifying triangles Classifying triangles by anglesClassifying shapes by lines and anglesClassifying triangles Classifying shapes by line and angles types

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