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Sagot :
Answer:
- 80°
Step-by-step explanation:
See the picture
It should be self-explanatory
The top part of the angle a is:
- 35° + 165° - 180° = 20°
The bottom part of the angle a is:
- 180° - 120° = 60°
The measure of angle a is:
- 20° + 60° = 80°
Firstly, draw a line parallel to UT
Something like in the picture
Now,
a = BNU
Also,
BNU + BNM = 165°
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