Need homework help which set of shapes contains members that are always similar to one another?

Anna is constructing a line segment that is congruent to another segment ab. for the construction, which tool should be used to mesure segment ab

I’m on question 7 it says a covered water tank is in the shape of a cylinder the tank has a 28 inch diameter and a height of 66 inches to the nearest square inch what is the surface area of the water tank

Ntriangle abc, m∠a = 35° and m∠b = 40°, and a=9. which equation should you solve to find b?