Answer:
Prob.3
Denote r: radius of circle O
Formula for calculating AOB sector:
Area = pi*r^2*angle/360
Area = pi*r^2*45/360 = 18 pi
=> r^2 = 18*360/45 = 144
=> r = 12
For prob.4, give it a try, follow the formula I gave. Good luck !
(answer : r = 6)
Answer:
Perpendicular
Step-by-step explanation:
If you look at the image, it shows a rectangular prism. The line CD is next to the line AD. It is perpendicular because someone could draw a right angle where the lines CD and AD meet.
I Hope That This Helps! :)
Answer:
C. just choose C. if it isn't right just tell me.
Answer:
B
Step-by-step explanation:
Answer:
x= -2/5
Step-by-step explanation:
(5x+2)=0
-2 -2
5x=-2
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5
x= -2/5