Types of Angles 角度的類型
Acute Angle 銳角
an angle that is less than 90°
角度小於90度的角
Right Angle 直角
an angle that is equal to 90°
角度等於90度的角
Obtuse Angle 鈍角
an angle that is greater than 90° and less than 180°
角度大於90度和小於180度的角
Straight Angle 平角
an angle that is equal to 180°
角度等於180度的角
Reflex Angle 優角
an angle that is more than 180° and less than 360°
角度大於180°和小於360°的角
Full Rotation 周角
an angle that is equal to 360°
角度等於360度的角
QUIZ測驗：
您也可以訂約Lboy Facebook Page 一起互動， 讓學習變得簡單快樂 https://www.facebook.com/lboyenglish
Youtube:
Lboy簡單快樂學英語