I don’t understand please someone explain!

What additional information could be used to prove abc =mqr using sas? check all that apply.

If value of cos330° is √3/2 then find tan165°.

If you have a set of parallel lines a and b cut by transversal x, if angle 1 = 167 degrees, what is angle 4 and why. also what is the measure of angle 5 and why? you need to use the names of the angle relationship and explain.