The third chapter of the 9th grade mathematics of the Hunan education edition of the "similarity of graphics" review courseware similarity of ppt graphics â‘ understand the basic nature of proportions, understand the ratio of line segments to a proportional line segment, understand the golden section through examples in architecture and art. â‘¡Recognize the similarity of graphics through specific examples, explore the properties of similar graphics, and know that the corresponding angles of similar polygons are equal, the corresponding sides are proportional, and the area ratio is equal to the square of the corresponding side ratio. â‘¢ Understand the concept of the similarity of two triangles and explore the conditions for the similarity of two triangles. â‘£Understand the bit-likeness of graphics, and can use bit-like to enlarge or shrink a figure.
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