主播大秀

We look at the meaning of scale factors and how they allow us to represent large objects in 2 and 3 dimensions. We demonstrate converting distance on a map to real-life distance and also how to calculate scale factor given the actual distance and distance on a map. Reading coordinates and placing coordinates on a set of axes is explained, which leads on to enlargement using scale factors on a coordinate plane. An example of calculating unknown sides of an enlarged shape is shown. The end sketch illustrates the idea of proportion.