4.G.2
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. Recognize right triangles as a category, and identify right triangles.
Example Problems
A rectangle has four right angles.
A parallelogram has two pairs of parallel sides.
Is every rectangle also a parallelogram?
A parallelogram has two pairs of parallel sides.
Is every rectangle also a parallelogram?
A kite has two pairs of adjacent sides that are equal.
A rhombus has four sides of equal length.
Is every kite also a rhombus?
A rhombus has four sides of equal length.
Is every kite also a rhombus?
A rhombus has four sides of equal length.
A square has four sides of equal length and four right angles.
Is every square also a rhombus?
A square has four sides of equal length and four right angles.
Is every square also a rhombus?
Khan Academy ResourcesTypes of triangles reviewQuadrilaterals reviewQuadrilateral typesClassify triangles by anglesClassify triangles by both sides and anglesClassify triangles by side lengthsClassify 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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