Answer:140° , given exterior angle between (001) and (021) = 40°, and so, interior angle between (001) and (021) = 180°-40°= 140°...then using law of interfacial angle then... int...
Answer: 130°
Given, exterior angle between (001) and (021) = 40°
So, the Interior angle between (001) and (021) = 180-40= 140
Now,
Sum of interior angles of a Pentagon= 540°
i...