12. Find the value of the variable m and classify the triangle by its sides and its angles.
m = /Z,q c
Classify by sides
SCCdf1?~ tr-,'al1.gIG
tn'anfi1e,
Classify by angles CbAA<--
13. Find the missing angles.
100
a, ~
b.
1:=&2-0
v=
1150
W :: 37°
14. Find the value of the missing angle measures.
a.
~
H
lD
150°"-....
124°
side
b.
5
So
:
540
CtYE.
II.
(5-2 ) (IIQO)
T
(to-2)(150) :: 7200
sides
F
130°
u
.:.:;.::..J
J
K
. -'/... +-
t
q 0 +- /2."
l- q 3 t I 30 t- -x.. ;:
'so
-;..
+-
561 ::12.0
130
+-
720
54- + 130 +c07=
'/.. ~ -+
=:
5+0
\X~129°1
jx.=-13301
t
\I
540
15. Find the slope of the line that contains the points A(-2, 3) and B(I, -1).
/7Yl 0
-I',- (-2.)
3
34-_]
'I
,
16. Write an equation for the line that contains point P( -3, 5) with a slope of -1.
y=m}(+-b
5::
-I (- 3) t b
5
=
3+-b :.
IU-.:-"Y--t-2..(
,-",_.-.\
---~.
b-= 2
17. Supply the reason for each step in the proof.
Given: I II m and L4 == L2
Prove: nil p
Statements:
1. /11m
Reasons:
1. ~; yen
2. Ll == L2
3. L4 == L2
4. Ll == L4
2. CouesponcLln~ LS
3. G jven
5. nil p
5. it- tOy(~$pO/'1cliI1j
rI
an ::.
4. TY'an<,;ih'VG
Ls
aYe
=:J
~n
+-hG
2.,LLnes
c.