determine the measures of the angles marked with letters

1) Now,
a + 27° = 90° (right angle triangle)
◆ a = 63°
2) Now,
b + b + b = 90° (right angle triangle)
or, 3b = 90°
◆ b = 30°
3) Now,
c + c + 40° = 90° (right angle triangle)
or, 2c = 90° - 40°
or, c = 50°/2
◆ c = 25°
4) Here,
◆ e = 41° (vertically opposite angle)
◆ f = 82° ( vertically opposite angle)
Now,
d + e + f = 180° (straight angle)
or, d + 41° + 82° = 180°
or, d = 180° - 123°
◆ d = 57°
Then,
◆ g = d = 57° (vertically opposite angle)
It is all correct answer...
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