Triangle angle relationships
To find a missing a missing angle what are 
the steps?
add all given angles then subtract from 180
add the angles to 180
Subtract angles from each other
none of the above
170
Add up all the degrees inside the triangle. 
 How many total degrees are there?
190
180
360
4.1 
How many degrees are in a right angle
Find the 
measure of ∡A
4.2
m∡A = 
B
o
25o
C
127o
x
A
4.1
Find the 
measure of ∡A
m∡A = 
B
30
ο
o
3x
A
C
4.1
Find the 
measure of ∡A
m∡A = 
A
o
x
51o
B
C
4.2 
Given the following diagram of ∆CDB.  
Find the value of x
x = 
A
o
B
xo
52o
C
D
Given the following diagram of ∆CDB.  Find the value of x..
4.2 
A
x = 
C
x
o
58o
D
B
(x + 12)o
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