Angles a and b are supplementary angles. What is the value of m∠a if m∠b=43°?(1 point)
Responses
137°
43°
47°
223°
If angles a and b are supplementary, then their measures add up to 180 degrees.
Since m∠b = 43°, the value of m∠a can be found by subtracting 43° from 180°.
180° - 43° = 137°
The value of m∠a is 137°.
Use the relationship between supplementary angles to determine the value of y° if x°=125° .
(1 point)
Responses
55°
305°
35°
125°
If angles x and y are supplementary, their measures add up to 180 degrees.
Since x° = 125°, we can find the value of y° by subtracting 125° from 180°.
180° - 125° = 55°
The value of y° is 55°.