Cambridge OLevel Mathematics Syllabus D revision notes
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??.

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