Triangle def is congruent to right triangle ghi with a right angle at vertex h. if the slope of de is –2, what must be true?

a. the slope of hi is 1/2.
b. the slope of ef is 1/2.
c. the slope of gh is –2.
c. the slope of df is –2.
hii plss me☹️

Select the lengths in centimeters that would form a right triangle

Which statements are true? check all that apply. the line x = 0 is perpendicular to the line y = –3. all lines that are parallel to the y-axis are vertical lines. all lines that are perpendicular to the x-axis have a slope of 0. the equation of the line parallel to the x-axis that passes through the point (2, –6) is x = 2. the equation of the line perpendicular to the y-axis that passes through the point (–5, 1) is y = 1.

Which inequality has a dashed boundary line when graphed ?