Answer: . Rotation about the y-axis by π
Step-by-step explanation:
Answer:
The answer is D) 12
Multiple 4 by 3
let one angle be X
so, other angle be 5x-12
ATQ
X+5x-12=180
6x=180-12
6x=168
X=168/6
hence X=28
now,one angle=28
other angle is 5×28-12
= 140-12.
= 128
