Lesson
Lesson-4.1.13 - Calculate unknown angles and give geometric explanations for angles formed within parallel lines: ??? corresponding angles are equal ??? alternate angles are equal ??? co-interior (supplementary) angles sum to 180??.
No content available for this lesson.
Lesson-4.1.12- Calculate unknown angles and give simple explanations using the following geometrical properties: ??? sum of angles at a point = 360?? ??? sum of angles at a point on a straight line = 180?? ??? vertically opposite angles are equal ??? angle sum of a triangle = 180?? and angle sum of a quadrilateral = 360??.PreviousLesson-4.1.14- Know and use angle properties of regular and irregular polygons. Includes exterior and interior angles, and angle sum.Next