Question

Please Help

Answer 1

11. False.( parallelograms have 4 edges, cylinders have only 2. )

12. True.(Get a piece of paper and draw your parallelogram.

Draw a diagonal, forming two triangles. Fold on the diagonal. The corners opposite the fold have equal angles. Now unfold it and draw the other diagonal, fold it on that diagonal, and note that the corners opposite the fold have equal angles.

Now choose one of the diagonals and cut the paralleleogram in two along it. Turn one piece over and turn it until you can rest it exactly on top of the other half. What if you had cut it along the other diagonal? Well, I didn't tell you which one to use; so figure that out. This says something about the angles being equal.

Now draw a rectangle and do the same thing with it. What does that tell you?

If one angle in the paralleleogram is 90 degrees, they all are.)

13.False ( http://dj1hlxw0wr920.cloudfront.net/userfiles/wyzfiles/93a7befa-0b72-4f33-8c12-9cf3cf86ffc7.gif)

14.True ( https://www.khanacademy.org/math/geometry/quadrilaterals-and-polygons/quadrilaterals/v/proof---opposite-angles-of-parallelogram-congruent)

Answer 2

thank you so much, @praxer :)

Answer 3

Welcome......:)