That's only true if the quadrilateral happens to be a rectangle or a square.
The adjacent sides of very few quadrilaterals are equal. This is most common in the square and the rhombus, but does not often happen in quadrilaterals such as the kite, the delta, the rectangle or the trapezium.
A square or a rhombus
Rectangles. (Which includes squares.)
it cant be possible
Kites or arrowheads.
Square & Rectangle are the only two. Rhombus (diamond) & parallelogram have adjacent sides, but no 90 degree angles (not perpendicular).
A square or a rectangle would fit the given description.
Parallelograms (if the equal sides are opposite one another) or kites (if they are adjacent).
negative reciprocal slopes
A kite, a square or a rhombus
square and a rectangle
To find:The product of the slopes of all 4 sides of rectangle ABCDSolution:Topic(s): Coordinate geometryThe product of the slopes of perpendicular lines = -1.From the sketch above,Answer: (D) 1