5.G.B.3
Understand that attributes belonging to a category of two‐dimensional figures also belong to all subcategories of that category. For example, all rectangles have four right angles and squares are rectangles, so all squares have four right angles.
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?
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