**Number:**MA.5.GR.1

**Title:**Classify two-dimensional figures and three-dimensional figures based on defining attributes.

**Type:**Standard

**Subject:**Mathematics (B.E.S.T.)

**Grade:**5

**Strand:**Geometric Reasoning

## Related Benchmarks

## Related Access Points

## Access Points

## Related Resources

## Formative Assessments

## Image/Photograph

## Lesson Plans

## Original Student Tutorials

## Problem-Solving Tasks

## Teaching Idea

## Tutorials

## Unit/Lesson Sequence

## Student Resources

## Original Student Tutorials

Explore the defining attributes of trapezoids--a special type of quadrilateral--and classify them using diagrams in this interactive tutorial. You'll also learn how two different definitions for a trapezoid can change affect classifications of quadrilaterals.

This part 6 in a 6-part series. Click below to explore the other tutorials in the series.

Part 1: "Figuring Out" 2D Figures

Part 2: Exploring Relationships with Venn & Euler Diagrams

Part 3: Classifying Triangles by Angles Using Euler Diagrams

Part 4: Classifying Triangles by Sides & Angles Using Venn and Euler Diagrams

Type: Original Student Tutorial

Learn how to classify quadrilaterals--including parallelograms, rectangles, rhombi, and squares--based on their defining attributes using diagrams in this interactive tutorial.

This is part 5 in a 6-part series. Click below to explore the other tutorials in the series.

**Part 1: "Figuring Out" 2D Figures****Part 2: Exploring Relationships with Venn & Euler Diagrams****Part 3: Classifying Triangles by Angles Using Euler Diagrams****Part 4: Classifying Triangles by Sides & Angles Using Venn and Euler Diagrams**- Part 6: (Coming Soon)

Type: Original Student Tutorial

Learn how to show relationships represented in Venn & Euler Diagrams as you complete this interactive geometry tutorial.

This is part two of four. Click below to open the other tutorials in the series.

**Part 1: "Figuring Out" 2D Figures - Part 1**- Part 2 Exploring Relationships with Venn & Euler Diagrams
**Part 3: Classifying Triangles by Angles using Euler Diagrams****Part 4: Classifying Triangles by Sides and Angles using Venn and Euler Diagrams**

Type: Original Student Tutorial

Learn how triangles can be sorted and classified using side lengths and angle measures in this interactive tutorial.

This is the final tutorial in a four-part series. Click below to open the other tutorials in the series.

**Part 1: "Figuring Out" 2D Figures - Part 1****Part 2 Exploring Relationships with Venn & Euler Diagrams****Part 3: Classifying Triangles by Angles using Euler Diagrams**- Part 4: Classifying Triangles by Sides and Angles using Venn and Euler Diagrams

Type: Original Student Tutorial

Learn to classify triangles and use Euler diagrams to show relationships, in this interactive tutorial.

This is part-three of four. Click below to open the other tutorials in the series.

**Part 1: "Figuring Out" 2D Figures - Part 1****Part 2 Exploring Relationships with Venn & Euler Diagrams**- Part 3: Classifying Triangles by Angles using Euler Diagrams
**Part 4: Classifying Triangles by Sides and Angles using Venn and Euler Diagrams**

Type: Original Student Tutorial

Explore 2D (two-dimensional) figures and see how every 2D figure possesses unique attributes in this interactive tutorial.

This is part one of four. Click below to open the other tutorials in the series.

- Part 1: "Figuring Out" 2D Figures - Part 1
**Part 2 Exploring Relationships with Venn & Euler Diagrams****Part 3: Classifying Triangles by Angles using Euler Diagrams****Part 4: Classifying Triangles by Sides and Angles using Venn and Euler Diagrams**

Type: Original Student Tutorial

## Problem-Solving Tasks

This activity provides students an opportunity to recognize these distinguishing features of the different types of triangles before the technical language has been introduced. For finding the lines of symmetry, cut-out models of the four triangles would be helpful so that the students can fold them to find the lines.

Type: Problem-Solving Task

This task provides students a chance to experiment with reflections of the plane and their impact on specific types of quadrilaterals. It is both interesting and important that these types of quadrilaterals can be distinguished by their lines of symmetry.

Type: Problem-Solving Task

The purpose of this task is for students to measure angles and decide whether the triangles are right or not. Students should already understand concepts of angle measurement and know how to measure angles using a protractor before working on this task.

Type: Problem-Solving Task

## Tutorials

This Khan Academy tutorial video presents examples and explanations for categorizations of perpendicular sides and right, obtuse, and acute triangles.

Type: Tutorial

In this Khan Academy tutorial video triangles are categorized by angles or side lengths of a specified size.

Type: Tutorial

This Khan Academy tutorial video introduces quadrilaterals. their categories, and subcategories.

Type: Tutorial

## Parent Resources

## Image/Photograph

In this lesson, you will find clip art and various illustrations of polygons, circles, ellipses, star polygons, and inscribed shapes.

Type: Image/Photograph

## Problem-Solving Tasks

This activity provides students an opportunity to recognize these distinguishing features of the different types of triangles before the technical language has been introduced. For finding the lines of symmetry, cut-out models of the four triangles would be helpful so that the students can fold them to find the lines.

Type: Problem-Solving Task

This task provides students a chance to experiment with reflections of the plane and their impact on specific types of quadrilaterals. It is both interesting and important that these types of quadrilaterals can be distinguished by their lines of symmetry.

Type: Problem-Solving Task

The purpose of this task is for students to measure angles and decide whether the triangles are right or not. Students should already understand concepts of angle measurement and know how to measure angles using a protractor before working on this task.

Type: Problem-Solving Task