Right angle i think
90 degree angle is right angle so jus Measure it
Answer
144
Step-by-step explanation:
12*12
X+8y=18
-5x+3y=-4
Multiply the first equation by 5
Add the two equations together
5x+40y=90
-5x+3y=-4
43y=86
Y=2
Plug y into one equation to find x
X+16=18
X=2