Answer :
[tex]Those\ two\ angles\ measure\ 180^{\circ}\\\\
x-\ angle\\\\
x+89=180\ \ \ \ | subtract\ 89\\\\
x=91^{\circ}\\\\ Other\ angle\ measures \ 91^{\circ}.[/tex]
A "straight angle" is a straight line.
The angle of a straight line is 180 degrees.
The value of 2 angles add together to make 180
One of the angles = 89 degrees
The value of the second angle = 180-89 = 91
The angle of a straight line is 180 degrees.
The value of 2 angles add together to make 180
One of the angles = 89 degrees
The value of the second angle = 180-89 = 91