Question

Angles a and b are supplementary angles. What is the value of%C2%A0 m∠a if%C2%A0 m∠b=43° ?(1 point) Responses 223° 223 degrees 43° 43 degrees 47° 47 degrees 137°

Answer 1

Since the angles are supplementary, the sum of their measures is 180°.
If m∠b = 43°, then m∠a = 180° - 43° = 137°.
Therefore, the value of m∠a is 137°.