Since angles a and b are supplementary angles, their sum is 180 degrees. Therefore, if angle b is 43 degrees, the value of angle a would be 180 degrees - 43 degrees, which equals 137 degrees.
Therefore, the correct answer is:
A. 137°
Angles a and b are supplementary angles. What is the value of m∠a if m∠b=43°?(1 point)
Responses
A. 137°
137 degrees
B. 43°
43 degrees
C. 223°
223 degrees
D. 47°
1 answer