Types of Angles and Relations between Angles

الدرس ده محتاج حساب

Angles are measured in degrees with a protractor. By size they are zero, acute, right, obtuse, straight or reflex. Two angles are complementary if they add to $90°$ and supplementary if they add to $180°$. Angles on a straight line add to $180°$, angles around a point add to $360°$, and vertically opposite angles are equal.

أول درسين في كل مادة مفتوحين للكل. سجّل الدخول أو اعمل حساب مجاني علشان تقرأ الدرس ده وباقي دروس المادة.