Use the properties of the rectangle.
The opposite angles of a parallelogram are equal.
sum of angle B and angle C =180 degree.
Regular polygons have all angles and all sides equal.
Use the properties of rhombus.
Angles on a straight line add up to 180°
The sum of the exterior angles of a regular polygon will always equal 360 degrees.
A quadrilateral has 4 sides
Use Pythagoras theorem to calculate the sides.
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