A window frame has one diagonal longer than the other. Is the window frame a rectangle? Why or why not?

The diagonals of a rectangle bisect each other

The diagonals of a parallelogram are not perpendicular. Is it a rhombus? Why or why not?

Prove that the diagonals of a rectangle bisect each other and are equal.

The longest side of a right angled triangle is 4cm longer than one side and 2 cm longer than the other side. Find the longest side.

If the trajectory of a body is parabolic in one frame, can it be parabolic in another frame that moves with a constant velocity with respect to the first frame? If not, what can it be?

One cannot get tanned or sunburn through glass window because

Two tall buildings are 30 m apart. The speed with which a ball must be thrown horizontally from a window 150 m above the ground in one building so that it enters a window 27.5 m from the ground in the other building is.

A window has the shape of a rectangle surmounted by an equilateral triangle. If the perimeter of the window is 12 m, find the dimensions of the rectangle that will produce the largest area of the window.

The diagonals of a rectangle intersect each other at right angles. Prove that the rectangle is a square.

Two tall buildings face each other and are at a distance of 180 m from each other. With what velocity must a ball be thrown horizontally from a window 55 m above the ground in one building, so that it enters a window 10.9 m above the ground in the second building ?