Math Knowledge Flash Card Set 398524

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).

vertical

When two lines intersect, angles across from either other are __________ (they're equal).