IM 7.9.1 Lesson: Planning Recipes

This GeoGebra example is part of the IM (Illustrative Mathematics) Grade 7, Unit 9, Lesson 1 titled 'Planning Recipes'. It demonstrates how to use proportional reasoning to adjust ingredient quantities in a recipe, while visualizing the relationships through geometric shapes such as quadrilaterals and prisms. The core mathematical concepts include ratios, proportions, unit conversion, and properties of geometric figures (quadrilaterals, prisms, line segments). The construction uses GeoGebra point objects (A1, B1, C1, D1) to define basic elements, likely allowing users to drag these points to alter the shape and simulate changes in recipe proportions. This resource is suitable for middle school students (Grade 7) learning about ratios and introductory geometry, and can be used for classroom demonstrations or self-paced exploration, making abstract proportional problems tangible through interactive geometric manipulation.