7.1.2: Properties of Angles - Mathematics LibreTexts
https://math.libretexts.org/Bookshelves/Applied_Mathematics/Developmental_Math_(NROC)/07%3A_Geometry/7.01%3A_Basic_Geometric_Concepts_and_Figures/7.1.02%3A_Properties_of_Angles
WebFinding Angle Measurements. Understanding how parallel and perpendicular lines relate can help you figure out the measurements of some unknown angles. To start, all you need to remember is that perpendicular lines intersect at a 90 o angle, and that a straight angle measures 180 o.
DA: 36 PA: 29 MOZ Rank: 1