Geometry True/False? (i really need help for my Exams to study)?

true or false:


1. if a quadrilateral is a parallelogram, then it is a rectangle


2. Some Parallelograms are rectangles


3. Some parallelograms are trapezoids.


4. every square is a rectangle


5. a rectangle is a parallelogram





i need these to study for my exam plzzGeometry True/False? (i really need help for my Exams to study)?
1- false (rectangles are parallelograms, and they are both quadrilaterals. parallelogram with a right angle is a rectangle)


2-true (if a parallelogram has one right angle, all the others are right angles, making it a rectangle)


3- false (a trapezoid has only 1 pair of parallel sides, a parallelogram has 2 pairs)


4-true (both rectangles and squares have 2 pairs of parallel sides and all right angles)


5- true (both have opposite sides congruent and parallel)Geometry True/False? (i really need help for my Exams to study)?
1. F


2. T


3. F


4. T


5. T
False, it could be...but not always.


True


False


True


True
I was going to go through and explain each answer, but I decided to just put the link for the wiki article where I got my info:





1. False- a rectangle must have 4 90 degree angles. A parallelogram does not.





2. True- see above.





3. False





4. True





5. True





See link below from Wiki
1. -


2.True


3. -


4. False


5. True





i don't know 1 and 3
1- false


2- true


3- true


4- true


5- true
1.False


2.True


3. - i'm not sure on this, i think it's false because trapezoids have only 1 pair of // lines, while parallelograms have 2 pairs of // lines. FALSE


4. True


5. True