Here, we know largest side is always opposite to the largest angle.
As largest angle is C with 90 degree, it's opposite side which is AB must be longest here!! & AC would be second largest & BC would be smallest.
In short, Your Answer would be Option B & D
Hope this helps!
Perpendicular to. that's what it means
The answer is:
(1,4) into (5,2)
(3,1) into (7,-1)
(1,1) into (5,-1)
X+y+z=22
(x+y+z+t)/4=8
subsitute
x+y+z=22
(22+t)/4=8
multiplly by 4
22+t=32
subtract 22
t=10
the fourth number is 10