Answer:
B. 94
Step-by-step explanation:
Angle B = 180 - 143 = 37°.
Angle B + Angle C + Angle D = 180°
37° + 49° + Angle D = 180°
Angle D = 180° - 86° = 94°
2
2 - 1 1
------ = ----- = 2
1 - 1/2 .5
this the answer.............. ...........
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