Idiot\'s Guides Basic Math and Pre-Algebra

Check Point Answers 321

19. 'DEF~'CAT, DE = 65 in, EF = 45 in,
    CA = 13 in. Find AT.


20. 'MNO~'LEG, MN = x – 3, NO = 3,
    EG = 21, LE = 2x + 4. Find LE.


21. sin ’A =
    BC
    AC

5

13



22. tan ’BC = AB
    BC

12

5



23. cos ’A = AB
    AC

12

13



24. tan ’A = BC
    AB

5

12



25. sin ’BC =
    AB
    AC

12

13



26. cos56
    42

x,

x42cos56 23.5,

XY } 24 cm

27. tan 46
    42

x

 ,

x 42 tan 46  43.5,

BC } 44 cm

28. sin30
    24

x,

x 24 sin30 (^12) ,
RS = 12 cm
65
13
45
65 585
9
x
x
x


x
x
xx
xx
x
x
x

• 3
  24
  3
  21
  21 3 3 2 4
  21 63 6 12
  15 63 12
  15 75
  5
  
   
  
  
  
  
  
  

10. BO CA, ’O # ’A, OX AR,

'BOX # 'CAR by SAS

11. 'ABC~'XYZ,

12. 'RST~'FED,

13. 'PQR~'VXW,

14. 'MLN~'LJK,

15. 'ZXY~'BCA,

16. 
    

    'GHI~'ARM, GH = 9 ft, GI = 8 ft, AR =
    12 ft. Find AM.

    
    


17. 
    

    'JKL~'DOG, JK = 17 m, JL = 25 m,
    DG = 30 m. Find DO.

    
    


18. 
    

    'ABC~'XYZ, AB = 21 cm, BC = 54 cm,
    XY = 7 cm. Find YZ.

    
    

AB

XY

BC

YZ

AC

XZ



RS

FE

ST

ED

RT

FD



PQ

VX

QR

XW

PR

VW



ML

LJ

LN

JK

MN

LK



ZX

BC

XY

CA

ZY

BA



9

12

8

996

102

3

x

x

x







17 25

30

25 510

20.4

x

x

x







21

7

54

21 378

18

x

x

x