If a line's slope is

, the slope of the perpendicular line is

in this case, the given line has a slope 4, which is 4/1, so the perpendicular line has a slope/gradient
Okay so CBE is a right angle which equals 90 degrees. CBD and DBE makes up CBE which is 23 degrees is part of CBD. So subtract CBE from CBD to get DBE which is 67 degrees.
Answer:
D/About 18.85
Step-by-step explanation:
So, Using the Circle Circumfrince Formula:

There you go!
Hope this helps!
P.S. Stay Safe!
Answer:
C
Step-by-step explanation: