Answer:
∠ ABD = 135°
Step-by-step explanation:
The 2 angles form a straight line and sum to 180° , then
3x + x = 184x = 180 ( divide both sides by 4 )
x = 45
Then
∠ ABD = 3x = 3 × 45° = 135°
angel ABD = 135°
ANGEL ABD+ ANGEL DBC = 180
3x + x = 180
4x = 180
x = 180/4
angel ABD = 3x
= 3×45
= 135°
