How do i find the missing angle measure in a polygon

Which term best describes the association between variables a and b? no association a negative linear association a positive linear association a nonlinear association a scatterplot with an x axis labeled, variable a from zero to ten in increments of two and the y axis labeled, variable b from zero to one hundred forty in increments of twenty with fifteen points in a positive trend.

Sam claims that cos x =sin y if x and y are congruent angels. is sam correct ?

Answer! if you don’t mind, can you explain