Missing Angle CBD = 20° | Desmos

Expression 10: "C" Subscript, 1 , Baseline equals StartFraction, "D" Subscript, 2 , Baseline Over tan 20 , EndFraction plus "D" Subscript, 1 , Baseline

equals

15.1 2 6 7 2 8 9 0 9 1

10

Expression 11: "C" Subscript, 2 , Baseline equals "A" Subscript, 2 , Baseline

equals

0

11

Expression 12: tangent to the negative 1st power StartFraction, "B" Subscript, 1 , Baseline minus "D" Subscript, 1 , Baseline Over "B" Subscript, 2 , Baseline minus "D" Subscript, 2 , Baseline , EndFraction equals 90 minus 50 minus 30

12

Expression 13: StartFraction, "B" Subscript, 1 , Baseline minus "D" Subscript, 1 , Baseline Over "B" Subscript, 2 , Baseline minus "D" Subscript, 1 , Baseline tan 10 , EndFraction equals tangent 10

13

Expression 14: "D" Subscript, 1 , Baseline equals StartFraction, "B" Subscript, 2 , Baseline tan 10 minus "B" Subscript, 1 , Baseline Over tan squared 10 minus 1 , EndFraction

equals

10.1 9 0 0 9 3 3 6 3 7

14

Expression 15: "D" Subscript, 2 , Baseline equals "D" Subscript, 1 , Baseline tangent 10

equals

1.7 9 6 7 8 8 3 9 5 9 6

15

Graphs

16

Expression 17: "y" less than 40

17

Expression 18: polygon left parenthesis, "A" , "D" , "C" , "D" , "A" , "B" , "D" , "B" , "C" , right parenthesis

18

Points

19

32

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