Please help I'm desperate...
2 answers:
The first step that isn’t show here is expressing the system in standard form. I assumed you would already know how to do that so I didn’t include it
As for the second system, I’d be happy to give you a solution for that as well, but I can only post one photo per question so you would have to post it again :)
As for the second system, I’d be happy to give you a solution for that as well, but I can only post one photo per question so you would have to post it again :)
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The inscribed angle theorem says that
Triangle AOC is isosceles because both AO and CO are radii of the circle and have the same length. This means angles CAO and ACO have the same measure and are congruent.
Angles ACO and COD are congruent because they form an alternating interior pair between the parallel lines AC and OD.
Taking all these facts together, we have
and since angle COB is made up of angles COD and DOB, these angles must be congruent, and so the arcs they subtend (CD and DB, respectively) must also congruent.