Angles a and b are supplementary angles. What is the value of m∠a if m∠b=43°?(1 point)
If two angles are supplementary, their sum is 180 degrees.
So, if m∠b = 43°, then:
m∠a + m∠b = 180°
m∠a + 43° = 180°
Subtracting 43° from both sides, we have:
m∠a = 180° - 43° = 137°
Therefore, the value of m∠a is 137°.