Question

what is the measure of angle abe? type your answer in the box.

Explanation:

Step1: Identify angle - relationship

$\angle ABE$ and the $40^{\circ}$ angle are supplementary.

Step2: Use supplementary - angle formula

Supplementary angles add up to $180^{\circ}$. Let $\angle ABE = x$. Then $x + 40^{\circ}=180^{\circ}$.

Step3: Solve for $x$

$x=180^{\circ}- 40^{\circ}=140^{\circ}$

Answer:

$140^{\circ}$