i think the answer is c 1.4
3x+x=180
x=45 is the right answer
To find the interior angle, you use the formula ((n - 2) x 180) / n (where n is the number of sides).
So, ((20 - 2) x 180) / 20 = 162
To find the exterior angle, you merely take away the interior angle from 180.
180 - 162 = 18, so the exterior angle is 18 degrees
Another, easier, way is to just divide 360 by n. All exterior angles always add to 360. Thus, 360 / 20 = 18 degrees
Answer & Step-by-step explanation:
i = 2
b = 150
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The equations:
i= b-148
or
b= i+148
or
b-i = 148
I am not really sure which equation you want, but I hope this helps!!!