Answer:
42 degrees
Step-by-step explanation:
x=42°
In any triangle, when all three angles are added together, their sum will always be 180°:
∠1+∠2+∠3=180
Insert any known values:
Simplify the addition:
Use inverse operations to find angle three. Subtract 138 from both sides:
Therefore, the unknown angle is 42°.
:Done
see image; 200; 400
y=20x
graph
