I’m still confused if i still got it right?

the answer is √205 which you have done correctly in part b.

in part a, the error in your work comes from having the y-axis part of the triangle incorrectly labeled with a distance of 5. the vertical distance between points (-6,-2) and (7,-8) is not 5; it is 6. count the tickmarks between -8 and -2 on the y-axis and you will get 6.

english, cause i can’t you

you need to give us more information since we can't answer