If the measure of angle IHK is 60° and x is the measure of angle GHI, which equation can be used to find the measure of ange GHI A 2x + 60° = 360° B 2x + 60° = 180° C. 2x + 120° = 360° D. 2x + 120° = 180"​

Which system of linear inequalities is graphed? can somebody pleasssse

In the following diagram it is given that dec,ab || dc, ad || eb, and ad is congruent to bc. a)why isn't abc a parallelogram even though it has a pair of parallel sides and a pair of congruent sides b)explain why be must be congruent to bc. further explain what type of triangle this makes triangle abc and what it tells you about angle 1 and angle 2c) finally why must angle 3 be congruent to angle 1? further, explain why we know that angle 3 is congruent to angle 2

Ineed to know the answer to this algebra question.