Desperately need tangent lines what is the perimeter? !

Each pair of tangents to a point makes two congruent segments to the circle.  So if we label all the little segments, say clockwise starting at the top, we get

27, 22, 22, 98, 98, 22, 22, 27

The sum is 338

338 in

arithmetic sequence: a sequnce in which the diffrence between any two consecutive terms is the same

step-by-step explanation:

since the airplane is moving with constant speed then the distance travelled can be calculated by x=u*t

in km/h would be:

x=640*3.5=2.240 km

in m/s would be:

u=640 km/h= 640.000 m/h =640.000/ 3600 m/s =177.8 m/s

t= 3.5 h= 3.5 * 3600 s=12.600 s

then x=u*t= 177.8*12.600= 2.240.280 m