PLZ HELPPP ME WITH THISS

In which figure is de bc ? a. figure 1 b. figure 2 c. figure 3 d. figure 4

Graph g(x)=2cosx . use 3.14 for π . use the sine tool to graph the function. graph the function by plotting two points. the first point must be on the midline and closest to the origin. the second point must be a maximum or minimum value on the graph closest to the first point.

What is the missing reason in the proof? segment addition congruent segments theorem transitive property of equality subtraction property of equality?