SOLUTION: Suppose ∠ A is complementary to ∠ B and ∠ B is supplementary to ∠ C . If m ∠ A is 21°, find m ∠ C .

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Question 840355: Suppose
∠
A
is complementary to
∠
B
and
∠
B
is supplementary to
∠
C
. If
m
∠
A
is 21°, find
m
∠
C
.
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
1.A%2BB=90
2.B%2BC=180
Subtract eq. 1 from eq. 2,
B%2BC-A-B=180-90
C-A=90
C-21=90
C=111