Answer:
15pi/60 = pi/4 hopefully this helps :)
Step-by-step explanation:
Angle in radians = arc / radius
15pi/60 = pi/4
m=7/9 or 0.78
m=Y2-Y1/X2-X1
m=6-(-1)/5-(-4)
m=7/9
m=0.777777777777777
30
the formula is a^2+b^2=c^2
18^2+24^2=c^2
900=c^2
c=30