The diagonals of a parallelogram (a) are congruent. (b) are ...

[TVarnum]

The diagonals of a parallelogram
 
  (a) are congruent.
  (b) are perpendicular.
  (c) bisect each other.
  (d) bisect the angles of the parallelogram.
  (e) All of these are correct.

Question 2

If a point P inside a triangle is the same distance from each of the three sides of the triangle,
  then P is:
 
  (a) The orthocenter of the triangle.
  (b) The intersection of the medians of the triangle.
  (c) The center of the circumscribed circle of the triangle.
  (d) The intersection of the angle bisectors of the circle.

[l.stuut]

Answer to Question 1

c

Answer to Question 2

d