31-34.

label Mathematics
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May 20th, 2015

31. sin 20=8/x

x=8/sin 20

x=23.4

tan 20 = 8/y

y=8/tan 20

y= 22

32. sin 40 =y/12

y=12sin 40

y=7.7

cos 40 =x/12

x=12cos 40

x=9.2

33. tan 40 = h/100

h=100tan 40

h=83. 9

34. AB=sqrt(0+9)=3

BC=sqrt(16+0)=4

CD=sqrt(0+9)=3

DA=sqrt(16+0)=4

rectangle.

May 20th, 2015

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