What is the name of a polygon that has four congruent sides and theses angle measures 60,120,60,120?

Rhombus

Step-by-step explanation:

A rhombus has 4 congruent sides and the opposite angle s are congruent. I will throw in something extra a rhombus has perpendicular bisectors

The correct answer for this is: rhombus.

Step-by-step explanation:

The name of a polygon that has four congruent sides with the angles measuring 60°, 120°, 60° and 120° is rhombus.

According to the properties of a rhombus, the opposite angles are equal and opposite sides are parallel.

However, the adjacent angles of rhombus are supplementary which means that they add up to 180°.

For example:

60° + 120° = 180°