Point H is the circumcenter of ΔJKL.

Point H is the circumcenter of triangle J K L. Lines are drawn from the points of the triangle to point H. Lines are drawn from point H to the sides of the triangle to form right angles and line segments H D, H E, and H F.
Which must be true?

Line segment F H is-congruent-to line segment D H
Line segment J F is-congruent-to line segment L H
Line segment J H is-congruent-to line segment L H
Line segment K F is-congruent-to line segment L D

3.17 scores on stats final. below are final exam scores of 20 introductory statistics students. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 57, 66, 69, 71, 72, 73, 74, 77, 78, 78, 79, 79, 81, 81, 82, 83, 83, 88, 89, 94 (a) the mean score is 77.7 points. with a standard deviation of 8.44 points. use this information to determine if the scores approximately follow the 68-95-99.7% rule. (b) do these data appear to follow a normal distribution? explain your reasoning using the graphs provided below.