Question

1. what is the sum of $a^{circ}+b^{circ}$?

options:
$180^{circ}$
we need more information to solve this problem.
the answer depends on the values of the individual angles.
$360^{circ}$

Explanation:

Step1: Identify straight angle property

$a^\circ + b^\circ = 180^\circ$ (they form a straight line, which is a 180° angle)

Step2: Confirm no extra info needed

No additional values are required, as adjacent angles on a straight line sum to 180° by definition.

Answer:

180°