What is the length, in units, of the hypotenuse of a right triangle if each of the two legs is 2 units? 4 units 2 units square root of 6 units square root of 8 units

Researchers were interested in whether relaxation training decreases the number of headaches a person experiences. they randomly assigned 20 participants to a control group or a relaxation training group and noted the change in number of headaches each group reported from the week before training to the week after training. which statistical analysis should be performed to answer the researchers' question?

What is the measure of the smallest angle in the diagram? 15 29 32 45

Quadrilateral abcd in the figure below represents a scaled-down model of a walkway around a historic site. quadrilateral efgh represents the actual walkway. abcd is similar to efgh. what is the total length, in feet of the actual walkway?