Quadrilateral means four sides.
Four right angles and four sides is a rectangle and if the sides are equal length it is a square.
A quadrilateral can have two right angles and still not be a rectangle, if one side is oblique (neither right nor parallel) to the others, but three right angles force the fourth, and you have a rectangle.
true
No, the circle is inscribed in the quadrilateral.
NO. A trapezoid cannot be a rectangle. If a parallelogram has one right angle then it is a rectangle. A trapezoid doesn't satisfy this condition because a trapezoid is a quadrilateral with exactly one parallel side which means that it doesn't have a right angle.
The side opposite the right angle in a right angle triangle is its hypotenuse
right angle?
A quadrilateral can have two right angles and still not be a rectangle, if one side is oblique (neither right nor parallel) to the others, but three right angles force the fourth, and you have a rectangle.
true
Rectangle, possibly a square if the adjacent sides are also equal.
Lots of them, since there's nothing in the definition of quadrilateral that says each side must be equal. I've never heard of a particular name for one in English though.
No, the circle is inscribed in the quadrilateral.
NO. A trapezoid cannot be a rectangle. If a parallelogram has one right angle then it is a rectangle. A trapezoid doesn't satisfy this condition because a trapezoid is a quadrilateral with exactly one parallel side which means that it doesn't have a right angle.
The side opposite the right angle is called the hypotenuse.
The side opposite the right angle in a right angle triangle is its hypotenuse
The side opposite the right angle of a right angle triangle is the hypotenuse
The side opposite the right angle is the hypotenuse.
No you could have Square, Rectangle, Rhombus, Parallelogram