A(b-c)=d solution is number 2. Attachment added
Which word best describes their measures? angles 1 and 2 form a right angle
2 answers:
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Given :
∠ABF = ( 7x + 20 )°
∠FBC=(2x - 5)°
∠ABC= 159°
To Find :
The value of x .
Solution :
Assuming B the center of a circle .
So , all three given angles must be added to 360° .
Therefore , the value of x is 20.67° .
Hence , this is the required solution .