Question

If = 143°, and = 39°, what is m∠DEC?
88°
89°
90°
91°

Answer 1

The answer is 89

arc DC-arc AB divided by 2 gets you the right answer.

Answer 2

Answer: the correct answer for odyssey ware is 91 i don’t know what dude is on above me but 91 is correct

Step-by-step explanation: