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 43° 43 degrees 47° 47 degrees 223° 223 degrees 137°
If angles a and b are supplementary, it means that the sum of their measures is 180 degrees. Since m∠b = 43°, we can find the value of m∠a by subtracting 43° from 180°:
m∠a = 180° - 43° = 137°