In the figure below, lines AC and ED are parallel. Angles ABC and ECD are right angles (though it doesn't look like it, they are).
B
Part A
Find a pair of corresponding angles, a pair of alternate interior angles, and a pair of
vertical angles in the figure.
and
Corresponding angles:
and
Alternate interior angles:
and
Vertical angles:

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

Which equation results from adding the equations in this system? x+6y=9 and -x+2y=-15

Which of the following disjunctions is true? 4 + 4 = 16 or 6 - 5 = 11 4 · 3 = 7 or 3 - 2 = 5 8 - 5 = 13 or 7 · 2 = 12 7 - 4 = 11 or 6 + 3 = 9