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Sagot :
Answer:
(a) Shapes with perpendicular sides and shapes without perpendicular sides
Step-by-step explanation:
This appears to be a reading comprehension problem, along with a requirement that you recognize squares and rectangles have right angles and pairs of parallel equal-length sides.
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The group descriptions are very careful to say that the members of Group B have no right angles. Members of both groups have equal-length sides and parallel lines, so those are not distinguishing criteria.
The relevant attribute for sorting appears to be right angles/no right angles.
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