This modeling task is focused on finding rectilinear area of two figures.
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This task requires students to find the area of a rectilinear figure and model their thinking through multiple equations. This task relates to the Common Core State Standards: 3.MD.C.7d and 3.OA.D.8.
This is a concrete referent reasoning task for Grade 3. Students need to use the diagram to find the information to find the area of a rectilinear figure. This is a task that would be a good starting point for solving problems for this standard.
This is a task from the Illustrative Mathematics website that is one part of a complete illustration of the standard to which it is aligned. Each task has at least one solution and some commentary that addresses important asects of the task and its potential use. Here are the first few lines of the commentary for this task: Find the area of each colored figure. Each grid square is 1 inch long....
In this activity Harry explains key concepts about finding the area of squares, rectangles and composite shapes. Also included: the mini-game Polygon-athon, a comic video about measuring area with sleeping bags, and quiz-show questions.
This task presents students with some creative geometric ways to represent the fraction one half. The goal is both to appeal to students' visual intuition while also providing a hands on activity to decide whether or not two areas are equal.
This is a rectangle subdivision task; ideally instead of counting each square. students should break the letters into rectangles, multiply to find the areas, and add up the areas. However, students should not be discouraged from using individual counting to start if they are stuck. Often students will get tired of counting and devise the shortcut method themselves.