Answer:
Yes they are congruent
they are congruent by SSS rule that is Side Side Side rule
AD = CD (given side) in the question itself
AB = CB (given side) in the question itself
Db = BD (common side)
thats why by SSS rule they are congruent
Answer:
meter is difference in height between the submarine and the aircraft
Step-by-step explanation:
The height of aircraft above the surface 
meter
Depth at which the submarine lies below the surface 
meter
Depth at which the underwater robotic vehicle below the surface 
meter
Difference in height between the submarine and aircraft is equal to
meter
Earthquakes can cause all of the above.
trigger other earthquakes - when there is a large magnitude earthquake it
lead to shake the earth's surface. Thus it can create more earthquakes on the same place or neighboring places.
cause billions of dollars - when there is a large disturbance it can destroy big buildings, homes, etc. Which is basically a billion dollar loss.
cause tsunami - If there is a disturbance in the earth's surface near sea's, etc there is chance of tsunami.
He spent 27.7 repeating minutes of his class talking.
