Math Knowledge Flash Card Set 286124

Card 2 of 10
Angles Around Lines & Points

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 either other are vertical (they're equal).

supplementary

When two lines intersect, adjacent angles are __________ (they add up to 180°).