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all trapezoids are parallelograms

From Wikipedia

Isosceles trapezoid

An isosceles trapezoid ( isosceles trapezium in British English) is a quadrilateral with a line of symmetry bisecting one pair of opposite sides, making it automatically a trapezoid. Some sources would qualify all this with the exception: "excluding rectangles." Two opposite sides (bases)

Question:1. Which of the above quadrilateral's diagonals are congruent? 2. Which of the above quadrilateral's diagonals bisect each other? 3. Which of the above quadrilateral's diagonals are perpendicular? 4. Which of the above quadrilaterals are regular? 5. Which of the above quadrilateral's both pairs of opposite sides are parallel? 6. Which of the above quadrilateral's have exactly one pair of opposite sides that are parallel? 7. Which of the above quadrilateral's have both pairs of opposite sides are congruent? 8. Which of the above quadrilateral's each diagonal bisects two angles?

Answers:1. parallelogram, rectangle, rhombus, square, and isosceles trapezoid 2. parallelogram, rectangle, rhombus, square, and isosceles trapezoid 3. rhombus and square 4. parallelogram, rectangle, rhombus, square, trapezoid, and an isosceles trapezoid? 5. parallelogram, rectangle, rhombus, square 6. trapezoid, and isosceles trapezoid 7. parallelogram, rectangle, rhombus, square 8. all

Question:Is a quadrilateral a parallelogram? Is a rectangle a parallelogram? Is a square a trapezoid? Is a trapezoid a quadrilateral? They are part of my review for my final but I always get confused which are which..

Question:State whether your trapezoid is isosceles.

Answers:I am not in a classroom, so I can't help with the "in your classroom" part. All these shapes are found in ordinary objects. You just have to look around - learn what each shape looks like, then look around or think what looks like that. For example, the monitor of a computer is a rectangle - so is a cell phone.

Question:rectangle trapezoid rhombus square 2) The diagonals must be congruent in which of the following? a rectangle a parallelogram a trapezoid none of these

Answers:1) A parallelogram is a 4 sided polygon where the opposite sides are equal. Trapezoids are the only shapes in the first list that don't satisfy the condition. Trapezoid 2) A rectangle is the only shape that satisfies the question. This is because all of the corners are at 90 degree angles and the opposite sides are congruent. Rectangle