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##### Which of the following quadrilaterals is a rhombus

a)         All four sides are equal
b)         Opposite sides are equal
c)         Opposite sides are parallel
d)         Angle between the diagonals is 60°

a)         45°
b)         60°
c)         75°
d)         90°

a)         30°
b)         72°
c)         60°
d)         108°

##### A parallelogram need not be a rectangle if

a)        diagonals are congruent
b)        diagonals bisect the angles to which they are drawn.
c)        diagonals are perpendicular to each other.
d)        opposite sides are parallel

a)        45
b)        90
c)        120
d)        140

##### If two consecutive sides of a rhombus are represented by  4x - 8  and  2x + 6,  then the perimeter of the rhombus is

a)        80
b)        60
c)        40
d)        76

##### The area of a rhombus is

a)        1/2 x product of the diagonals
b)        product of diagonals
c)         1/3 x product of the diagonals
d)         1/4 x product of the diagonals

##### In the adjoining figure ABCD is a rhombus where AC=8cm and BD=6cm then BC equals to a)         7 cm
b)        10 cm
c)        5 cm
d)        12 cm

##### In a quadrilateral ABCD, angle A plus angle C is 2 times angle B plus angle D. If angle A=40° then angle B equals to

a)         60°
b)    75°
c)         110°
d)    None of the above

##### Which property is not true for all trapezoids?

a)         Only two opposite sides are parallel.
b)         Angles of opposite parallel sides are equal
c)         Two opposite sides are non-parallel
d)         All angles are equal.

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