The rule for clockwise rotation of 90 degrees about the origin is (-y, x).
So (-1,9) would now be (-9,1).
Hope this Helps!!
Answer:
55°
Step-by-step explanation:
y+x=180°
25°+30°+x=180°
25°+30°=y
y=55°
*Exterior Angle Theorem*
<u><em>Sorry for the lack of explanation. It's midnight, so I didn't have much time.</em></u>
