
A parallelogram with all sides equal is known as,
(A). Rhombus
(B). Square
(C). Rectangle
(D). None of these
Answer
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Hint: Parallelogram is any quadrilateral whose opposite sides are parallel and thus its opposite sides as well as opposite angles are equal.
ABCD is a parallelogram.
Sum of adjacent angles are 1800
h is perpendicular to the base (DC) which is known as height of the parallelogram.
Area of parallelogram is given by,
Complete step-by-step answer:
*In rhombus all the sides are equal and opposite sides are parallel to each other. Thus rhombus is an example of parallelogram. The figure of rhombus is given below.
In the above figure all the sides are equal.
*In square also all the sides are equal and opposite sides are parallel to each other. Hence square is also a parallelogram. The figure of a square is given below.
In the above figure all the sides are equal.
*In the rectangle opposite sides are parallel to each other but all the sides are not equal. Hence the rectangle is a parallelogram but all sides are not equal. The figure of a rectangle is given below.
In the above figure only opposite sides are equal.
Hence the answer of the question is option (A) and option (B).
Note: Square and rectangle are called a special type of rectangle as all the interior angles of the quadrilateral are 900. Also the diagonals are also equal in length.

ABCD is a parallelogram.
Sum of adjacent angles are 1800
h is perpendicular to the base (DC) which is known as height of the parallelogram.
Area of parallelogram is given by,
Complete step-by-step answer:
*In rhombus all the sides are equal and opposite sides are parallel to each other. Thus rhombus is an example of parallelogram. The figure of rhombus is given below.

In the above figure all the sides are equal.
*In square also all the sides are equal and opposite sides are parallel to each other. Hence square is also a parallelogram. The figure of a square is given below.

In the above figure all the sides are equal.
*In the rectangle opposite sides are parallel to each other but all the sides are not equal. Hence the rectangle is a parallelogram but all sides are not equal. The figure of a rectangle is given below.

In the above figure only opposite sides are equal.
Hence the answer of the question is option (A) and option (B).
Note: Square and rectangle are called a special type of rectangle as all the interior angles of the quadrilateral are 900. Also the diagonals are also equal in length.
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