Note: this may not be correct, I haven't done angles in a while and kind of forgot most of it but this is what I think the answer is.
Answer: b=157° c=23° d=157°
Explanation:
The line goes straight across each other. This creates same angles on either side of the line. Angle C is a reflection of Angle A, so C is also 23°.
Half a full circle is 180°. If angles B and D are less than half a circle, but more than Angles A and C, then:
180-23=157
Angles B and D are 157° each.