Answer:
45°
Step-by-step explanation:
Since these angles all make 180° So we can do the sum like this
x can be the angle we want to find .
180°= 45° + 90° + x
180°= 135° + x
180° -135 ° = x (Due to transposition )
45°=x
or x=45°
To verify the answer
add them all and you will get 180°
45°+90°+45° = 180°
