Question

if angle a is 25 degrees, what is the measure of angle b? multiple - choice question 90 degrees 25 degrees 155 degrees 105 degrees rewatch skip ∠a+∠b = straight angle

Explanation:

Step1: Recall angle - sum property

A straight - angle measures 180 degrees. Given $\angle A+\angle B = 180^{\circ}$ and $\angle A = 25^{\circ}$.

Step2: Solve for $\angle B$

We can use the equation $\angle B=180^{\circ}-\angle A$. Substitute $\angle A = 25^{\circ}$ into the equation: $\angle B=180 - 25$.
$\angle B = 155^{\circ}$

Answer:

155 degrees