Yes the 4 corners of a rectangle are perpendicular to each other and its opposite sides are parallel to each other.
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Squares and rectangles
YES!!! By the fact that is is named a 'Rectangle'. ,the anglesw are all 90 degrees. This means that all the angles are right angles, hence making the sides perpendicular. Quadrilateral means a four sided figure. It is a collective noun for rectangles and non-rectangles. Rectangles are squares, and rectangles. Non-rectangles are , parallelograms, rhombus, trapezium, kite.
Rectangles. (Which includes squares.)
Yes. The basic definition for a rectangle is 4 sides, four right angles(perpendicular), and opposite sides are congruent.
No. This is only true of squares and rectangles. Perpendicular means that the sides meet in a right angle. A rhombus has two acute angles and two obtuse angles.