Yan knows that 21 and 25 are corresponding angles. She also knows
that supplementary angles have
measures that add to 180°. How could
Yan use these two facts to deduce that
Llis supplementary to 26?

Yes, that is the correct formula. to solve this problem given the number of years, plug in the number of years for t and plug the whole thing into the

1. statement- ca is parallel to db and e is the midpoint of ad reason- given2. statement- reason- alternate interior angles3. statement- de is congruent to ae reason- definition of midpoint4. statement- triangle aec is congruent to triangle deb reason- asa (angle side angle)