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(1) Parallelogram A parallelogram is a quadrilateral with two sets of parallel sides. The opposite or facing sides of a parallelogram are of equal length, and the opposite angles of a parallelogram are equal.


(2) Square
A square is a regular quadrilateral. This means that is has four equal sides and four equal angles.


(3) Rhombus
A rhombus is a quadrilateral whose four sides all have the same length. Opposite angles of a rhombus have equal measure. The two diagonals of a rhombus are perpendicular.


(4) Rectangle
A rectangle normally refers to a quadrilateral with four right angles.
Parallelogram

Square

Rhombus

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Wiki User

10y ago
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Elijah Winners

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1y ago
bro just say the answ
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Anonymous

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3y ago

rectangle

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Q: Which quadrilaterals are opposite angles always congruent?
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