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Angle ABD = X = 18
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Expression 12: "y" equals "m" Subscript, 1 , Baseline "x"
y
=
m
1
x
12
Expression 13: "y" equals "m" Subscript, 2 , Baseline left parenthesis, "x" minus "C" Subscript, 1 , Baseline , right parenthesis
y
=
m
2
x
−
C
1
13
Expression 14: "m" Subscript, 1 , Baseline "D" Subscript, 1 , Baseline tilde "m" Subscript, 2 , Baseline left parenthesis, "D" Subscript, 1 , Baseline minus "C" Subscript, 1 , Baseline , right parenthesis
m
1
D
1
~
m
2
D
1
−
C
1
14
Expression 15: "D" Subscript, 2 , Baseline equals "m" Subscript, 2 , Baseline left parenthesis, "D" Subscript, 1 , Baseline minus "C" Subscript, 1 , Baseline , right parenthesis
D
2
=
m
2
D
1
−
C
1
equals
=
1.2 8 4 9 6 4 9 1 5 8 4
1
.
2
8
4
9
6
4
9
1
5
8
4
15
Expression 16: "m" Subscript, 3 , Baseline equals tangent left parenthesis, 12 plus "A" Subscript, "B" "D" , Baseline , right parenthesis
m
3
=
t
a
n
1
2
+
A
B
D
equals
=
0.5 7 7 3 5 0 2 6 9 1 9
0
.
5
7
7
3
5
0
2
6
9
1
9
16
Expression 17: "y" equals "m" Subscript, 3 , Baseline "x"
y
=
m
3
x
17
Expression 18: "m" Subscript, 2 , Baseline left parenthesis, "A" Subscript, 1 , Baseline minus "C" Subscript, 1 , Baseline , right parenthesis tilde "m" Subscript, 3 , Baseline "A" Subscript, 1 , Baseline
m
2
A
1
−
C
1
~
m
3
A
1
18
Expression 19: "A" Subscript, 2 , Baseline equals "m" Subscript, 3 , Baseline "A" Subscript, 1 , Baseline
A
2
=
m
3
A
1
equals
=
2.0 7 9 1 1 6 9 0 8 1 8
2
.
0
7
9
1
1
6
9
0
8
1
8
19
Graphs
Graphs
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20
Expression 21: polygon left parenthesis, "B" , "D" , right parenthesis
p
o
l
y
g
o
n
B
,
D
21
Expression 22: polygon left parenthesis, "A" , "B" , "C" , "D" , right parenthesis
p
o
l
y
g
o
n
A
,
B
,
C
,
D
22
Points
Points
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23
34
powered by
powered by
A
B
C
D
12°
X
18°
"x"
x
"y"
y
"a" squared
a
2
"a" Superscript, "b" , Baseline
a
b
7
7
8
8
9
9
over
÷
functions
(
(
)
)
less than
<
greater than
>
4
4
5
5
6
6
times
×
| "a" |
|
a
|
,
,
less than or equal to
≤
greater than or equal to
≥
1
1
2
2
3
3
negative
−
A B C
StartRoot, , EndRoot
pi
π
0
0
.
.
equals
=
positive
+
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