In ΔEFG, the measure of ∠G=90°, the measure of ∠E=77°, and GE = 8 feet. Find the length of EF

Lola says these two expressions have the same value. expression a expression b which explains whether lola is correct?

What is the name of a polygon that has four congruent sides and theses angle measures 60,120,60,120?

(fog)(x) if f(x)=x^2- 4 and g(x)=x^2 + 2 x, f(g(x))= f(x^2+2x) (x^2+2x)^2-4 (x^2+2x)(x^2+2x)-4 (x^4+2x^3+5x+4x^2)-4 x^4+2x^3+4x^2+5x-4 what am i doing wrong