Characteristics and Proofs of a Rectangle: True / false

True or false:

The sum of the angles of a rectangle is 360.

We know that the sum of the angles in a quadrilateral is 360.

Since a rectangle is a type of quadrilateral, the sum of its angles is also equal to 360.

Likewise, we know that all the angles in a rectangle are right angles (90 degrees).

$90\times4=360$

True

In a rectangle, are the diagonals equal to each other and do they cross each other?

Yes.

Are the opposite sides different from each other in each rectangle?

No

It is possible to have a rectangle with different angles?

No

Are opposite sides parallel to each other in each rectangle?

Yes

True or false?

Every square is a rectangle and every rectangle is a square.

False

There may be a rectangle with an acute angle.

Not true

A quadrilateral has at least 3 angles of 90 degrees and two pairs of equal opposite sides. Is it a rectangle?

Yes.

A rectangle can have diagonals that are not equal.

False