tayluvsya 2 years ago help plez i have Geometry

1. tayluvsya

2. tayluvsya

i need it explained to me plez and thank u

3. aaliyah11

4. tayluvsya

i need it explained how they got that answer can u help

5. aaliyah11

what is it

6. tayluvsya

???? what is what

7. Mertsj

angles 11 and 13 are alternate exterior angles.

8. yrelhan4

what do you need help with? i mean this is a theorem.. do you need the proof?

9. tayluvsya

i need it explain how they got the answer

10. tayluvsya

for corrections

11. yrelhan4

do you know what corresponding angles are?

12. Mertsj

If two parallel lines are cut by a transversal, then the alternate exterior angles are congruent.

13. tayluvsya

yes

14. Mertsj

And the converse is also true. If two lines are cut by a transversal and the alternate exterior angles are congruent, then the lines are parallel.

15. yrelhan4

look. angle 11 and angle15 are equal as they are corresponding. also angle15 and angle 13 are equal as they are vertically opposite. so can imply angle11 and angle13 are equal.. which is what the theorem says!

16. tayluvsya

thnks @yrelhan4

17. Mertsj

18. yrelhan4

:)

19. tayluvsya

and thnks @Mertsj