Angles a and b are supplementary angles. What is the value of m∠a if m∠b=43° ?(1 point) Responses 137° 137 degrees 43° 43 degrees 223° 223 degrees 47°
By definition, supplementary angles add up to 180 degrees. Since angle b is 43 degrees, angle a would be 137 degrees.
Therefore, the value of m∠a is 137°.