Question

what is the measure, in degrees, of ∠abc? 65° 25° 77.5° 90°

Explanation:

Step1: Recall linear - angle property

$\angle ABC+\angle CBD = 180^{\circ}$

Step2: Substitute the value of $\angle CBD$

$\angle ABC+155^{\circ}=180^{\circ}$

Step3: Solve for $\angle ABC$

$\angle ABC=180^{\circ}- 155^{\circ}=25^{\circ}$

Answer:

B. $25^{\circ}$