Which quadrilateral is a parallelogram

III figure

Step-by-step explanation:

Parallelogram:It is a figure of four sides.The opposite sides of parallelogram are equal and parallel.

Properties of parallelogram:

1.Opposite angles are equal.

2.Opposite sides are equal and parallel.

3.Sum of interior angles on the same side is equal to 180 degrees.

4.Diagonals of parallelogram bisect to each other.

When sum of interior angles on the same side is equal to 180 degrees.Then, the sides are parallel.

When one pair of opposite sides is  parallel then, the quadrilateral is a parallelogram.

In I figure:

Sum of interior angles=

Sum of interior angles=

Side AC is not parallel to side BD.

Hence, it is not a  parallelogram .

In II figure:

Sum of interior angles=

Therefore, side AC is not parallel to side BD.

Hence, it is not a  parallelogram .

In III figure:

Sum of interior angles=

Therefore, side AC is  parallel to side BD.

Hence, quadrilateral ABCD is a parallelogram.

In IV figure:

Sum of interior angles=

Therefore, side AB is not parallel to side CD.

Hence, quadrilateral ABCD is not  a parallelogram.

x is greater than 5

step-by-step explanation:

2x+7 is greater than 17

    -7                           -7

2x is greater than 10

divide by 2 each side

x is greater than 5

the answer is: d) o, f, and kr.

atomic radius of bromine (br) is 114 pm.

atomic radius of oxygen (o) is 73 pm.

atomic radius of fluorine (f) is 72 pm.

atomic radius of krypron (kr) is 112 pm.

the atomic radius of a chemical element is a measure of the size of its atom.

the atomic radius varies with increasing atomic number, but usually increases because of increasing of number of electrons.

the atomic radius decreases across the periods because an increasing number of protons, because greater attraction between the protons and electrons.