When two lines intersect, adjacent angles are

`_________`

(They add up to 180°) and angles across from each other are `_________`

(They're equal).When two lines intersect, adjacent angles are

`_________`

(They add up to 180°) and angles across from each other are `_________`

(They're equal).Detailed Explanation

Angles around a line add up to 180°. Angles around a point add up to 360°. When two lines intersect, adjacent angles are supplementary (they add up to 180°) and angles across from each other are vertical (they're equal).