Which methods could you use to calculate th y-coordinate of the midpoint of a vertical line segment with ndpoints at (0,0) and (0,-12)? check all that apply A. divide -12 by 2
B. count by hand
C. divide 12 by 2
D. Add the endpoints

according to the triangle sum theorem, all the angles in a triangle must add up to 180 degrees. if we know one angle is already 90, we do 180-90=90. the other 2 angles must add up to 90, exactly.

step-by-step explanation:

first, you divide the triangle in two, tô form a retangle triangle. after, using pythagoream theorem:

18^2 = 14^2 + (x/2)^2

(x^2/4) + 196 = 324

x^2/4 = 324 - 196

x^2/4 = 128

x^2 = 512

x = √512

x = √2^9

x = 16√2 cm

i hope i you.

lol 2

step-by-step explanation: