Find the measure of angle ABC.
A. 124
B. 97
C. 56
D. 51
2 answers:
Answer: Last Option
Step-by-step explanation:
By definition the sum of the internal angles of a triangle must always be equal to 180 °.
This means that:

Now we solve the equation for the variable x




We subtract 12 in both barks of the equation


Divide by 3 on both sides of the equation



Finally the measure of angle ABC is: (56-5)° = 51°
The measure of angle ABC is 56 .
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