## icalibear 2 years ago Can somebody check my geometry homework and help with one question I can't get? PLEASE :(

1. icalibear

2. aroub

I disagree with you on 2 and 3

3. icalibear

I just guessed on 2 I don't know what they mean

4. icalibear

like what is that rule

5. phi

For Q2, do you know what SAS is short for?

6. icalibear

no what is it short fot? thats probably why i cant get it

7. aroub

In 2 they just want to you to choose which triangle can be proven by using "Side Angle Side" and that angle must be between those two sides.

8. phi

As aroub says, you want (in both triangles) Side Angle Side in that order

9. icalibear

oh so the answer would be G) because it's then angle

10. icalibear

side then*

11. phi

both triangles share the same side. so that is side. the next angle is 90 degrees, so you have the angle, then the 3rd side is marked congruent so G is SAS

12. icalibear

ok and for number 3 what did i do wrong there?

13. phi

for Q3, you could look for SSS or SAS. which one of the choices will give you one or the other?

14. icalibear

umm A), because it's SAS?

15. phi

Are you reading what I am ? A says PN=SQ those are sides. the picture gives you 2 sides. You need the 3rd (unmarked) sides to be =, or you need the angle between the marked sides to be equal (SAS means in that order)

16. icalibear

you would need <O and <S then because those are the unmarked angles that are equal?

17. phi

and angle O is between the 2 marked sides and S is between the 2 marked sides. It is not angle P= angle S because P is not between the marked sides

18. icalibear

oh got confused there ok so its D

19. phi

B says ON=QR but in the picture ON is marked with 2 dashes. ON matches the 2 dashes on OS. You would want the unmarked sides to be = (NP=QR) then you could use SSS. But the answer is D

20. icalibear

ok thanks i just got confused there and for the last one is the answer H)? since its the same thing as before?

21. phi

choice H would give you angle side angle in the first triangle what does angle F give you? (remember, you "read" the triangle side angle side angle and so on. If a side or angle is unmarked just say ? what does angle F give you?

22. icalibear

it looks like side-angle-angle-side

23. icalibear

oh i thought you said option F hold on

24. icalibear

f gives you angle-side-angle

25. phi

there are 3 sides and 3 angles. If we start with side DE, it is marked, so we can say side angle E is marked. so now we have side angle side EF is not marked so we have side-angle-? angle F is marked (per choosing option H) so side-angle-?-angle now side FD is unmarked: side-angle-?-angle-? finally, angle D is unmarked: side-angle-?-angle-?-? now we need in the exact order side-angle-side but we do not have that, because we have ? in between.

26. icalibear

so to prove it we have to find ? which has to be side

27. icalibear

the answer would be F) because thats side-angle-side-angle

28. phi

that would work. side-angle-?-angle-?-? ^ | if we can match this side (side EF) with the other triangle, we could use side-angle-side

29. icalibear

to match it with the other triangle you could flip EF and have it congruent then you would have s-a-s

30. phi

yes, side EF matched with HI gives SAS.

31. icalibear

ok got it. thanks so much>!

32. phi

OK. I hope it is not too confusing. A little practice helps.

33. icalibear

yeah definitely i just didn't know how i as suppose to read it or what sas stood for or anything so this definitely helped

34. phi