A study is planned to research the effects of drinking coffee on hours of sleep. Would an experimental or observational study design be more appropriate

Which expression is equivalent to the expression shown?

Thanh and her crew are building a stage in the shape of a trapezoid for an upcoming festival. the lengths of the parallel sides of the trapezoid are 14 ft and 24 ft. the height of the trapezoid is 12 ft.what is the area of the stage? enter your answer in the box. ft²

Which statements are true about additional information for proving that the triangles are congruent check all that apply