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: First pose the question: Here are four triangles. What do all of these triangles have in common? What makes them different from the figures that are no...

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: Which of the polygons are right triangles? Choose a measuring tool to help you determine this. These are right trianglesThese are not right triangles F...

This lesson is a task in the Geometry strand that can be used for students discovering what makes a correct polygon and what does not.  This lesson can be extended to upper primary students to include classifying types of triangles.https://goopenva.org/courses/1-g-all-vs-only-some

VA SOL 5.13a The purpose of this task is to help students define attributes for triangles, squares, and rectangles. 

This resource is a series of Google Slides that asks if two attributes of quadrilaterals and triangles can exist together 'Never, Sometimes, or Always.' After posing the question, the following slide will show the an and possible examples of the given polygons.

Classifying, sorting, and describing triangles  Mathematics Instructional Plans (MIPs) help teachers align instruction with the Mathematics Standards of Learning (SOL) by providing examples of how the knowledge, skills and processes found in the SOL and curriculum framework can be presented to students in the classroom.

This is a slide presentation for a complete lesson on a Python program using turtle. Lesson plan and example Python program are attached.