Properties of Parallelograms

What is the relationship between opposite sides in a parallelogram?

• They are always equal in length.

• They are not related.

• They are parallel.

• They are perpendicular.

If one angle in a parallelogram is 79 degrees, what is the measure of the opposite angle?

• 101 degrees

• 79 degrees

• 180 degrees

• 90 degrees

What is the sum of two consecutive angles in a parallelogram?

• 90 degrees

• 180 degrees

• 360 degrees

• They are always equal.

In a parallelogram, if one diagonal is drawn, what happens to the two halves of the diagonal, when a second diagonal is drawn through them?

• They are congruent.

• They are perpendicular.

• They are parallel.

• They are not related.

If the diagonals of a parallelogram bisect each other, and one half of a diagonal is 4 units, what is the total length of the diagonal?

• 4 units

• 2 units

• 16 units

• 8 units

If AB = 5x + 2 and DC = 7x - 20, what is the length of DC?

• 11

• 57

• 9

• 43

Given parallelogram ABCD, AC = 12 and EA = 2x - 6, find the value of x.

• 6

• 53

• 127

• cannot be determined