Lesson
Lesson-4.1.11- Recognize line symmetry and order of rotational symmetry in two dimensions. Includes properties of triangles, quadrilaterals and polygons directly related to their symmetries.
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Lesson-4.1.10- Solve problems and give simple explanations involving similarity. Includes showing that two triangles are similar using geometric reasons.PreviousLesson-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??.Next