Question 1031419

*[illustration radius.png]

OMP is a right triangle

OP^2 + OM^2 + MP^2

3^2= (2.5)^2+OM^2

OM^2 = 3^2-2.5^2

OM = 1.66

OB = sqrt( OM^2+MB^2)

= sqrt( 1.66^2+7.6^2)

= 7.78 cm  the radius