What is the name of a polygon that has four congruent sides and these angle measures: 70, 110,

Rhombus

A rhombus has all four sides congruent or equal to one another. The four angles do not have to be right angles. If they were right angles, then the rhombus would also be a square (all squares are also a rhombus). However, in this case, the four angles are 70, 70, 110, 110. So this rhombus is a not a square.