What o angles around point add up to ?

Determine whether triangle tjd is congruent to triangle sek  givent (-4,-2), j (0,5), d (1,-1), s (-1,3), e (3,10), k (4,4)and explain the reason.  select one: a. yes, by sssb. no, by aasc. no, by asad. yes, by sas

Find the value of the cosine for angle a

What is the standard form of -5x^2+2x^4-11+x^3+3x