## UmmmHELP 2 years ago Solve for a and b.

1. UmmmHELP

2. UmmmHELP

nope no clue how to do this at all!

3. aajugdar

find the angle find the sides

4. aajugdar

okay hold on

5. UmmmHELP

okay well if I am correct one is 90 degrees and there are two that have the same measurement but I dont know the number that goes to it... @aajugdar

6. Luis_Rivera

Okay I won't interrupt but this is so easy

7. UmmmHELP

no its fine if you can help please do! @Luis_Rivera

8. aajugdar

yes here the 2 angles are equal so trigonomatric values wil be same so cos =21/29 and for other angle cos = 20/b

9. aajugdar

so 21/29 = 20/b solve for b

10. UmmmHELP

okay, I dont see that for the answers ^ would it just be 20*29 then that divided by 21? @aajugdar

11. Luis_Rivera

a= 19 b= 28

12. aajugdar

yea

13. UmmmHELP

okay so then what?

14. aajugdar

then use pythagorus?

15. UmmmHELP

but this is using fractions? like the answers are all fractions

16. aajugdar

did you get b=28

17. aajugdar

18. UmmmHELP

a= 400/21, b= 580/21 a= 400/21, b= 20/21 a=580/21, b=29/21 a= 20/21, b= 580/21

19. Luis_Rivera

dude no need for Pythagoras

20. UmmmHELP

okay...

21. UmmmHELP

yeah i am sorry i still dont get it..i

22. UmmmHELP

23. Luis_Rivera

Where there are the lengths of the sides in the pc, substitutes the number you have. gotta go

24. UmmmHELP

okay thanks