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# Standard #: MAFS.3.G.1.2 (Archived Standard)

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Partition shapes into parts with equal areas. Express the area of each part as a unit fraction of the whole. For example, partition a shape into 4 parts with equal area, and describe the area of each part as 1/4 of the area of the shape.

### General Information

Subject Area: Mathematics
Domain-Subdomain: Geometry
Cluster: Level 1: Recall
Cluster: Reason with shapes and their attributes. (Supporting Cluster) -

Clusters should not be sorted from Major to Supporting and then taught in that order. To do so would strip the coherence of the mathematical ideas and miss the opportunity to enhance the major work of the grade with the supporting clusters.

Date of Last Rating: 02/14
Status: State Board Approved - Archived
Assessed: Yes

### Test Item Specifications

Assessed with:
MAFS.3.NF.1.1

### Sample Test Items (1)

 Test Item # Question Difficulty Type Sample Item 1 A triangle representing one whole is shown.Complete the sentences to make true statements about the triangle. For each blank, fill in the circle before the word or phrase that is correct.The parts of the triangle have A. equal areas since they are A. the same size.    B. unequal       B. different sizes. The area of each part is A. one-fourth.    B. unknown. N/A ETC: Editing Task Choice

#### Related Courses

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#### Formative Assessments

 Name Description Unit Fractions Students divide a hexagon into two, three, and six equal parts and write the unit fraction representing each part. Two Equal Parts Students divide figures into two parts, each having the same area, and write the unit fraction representing each part. Halves of an Irregular Polygon Students partition an irregular hexagon into two equal parts and describe each part using a unit fraction. Four Parts of the Whole Students partition a rectangle into four equal parts and describe each part using a fraction.

#### Lesson Study Resource Kit

 Name Description Geometry Lesson Study Resource Kit – Third Grade This lesson study resource kit can be used to guide and support teams of third grade teachers as they engage in lesson study focused on the academic standards in the Geometry domain.

#### Presentation/Slideshows

 Name Description Fractions This is an accessible, easy-to-read book introducing fractions. It can be downloaded in PowerPoint, Impress, and Flash formats. For struggling or non-readers the book can be read aloud in a variety of voices. All of the books on the Tar Heel Reader site can be used with the Intellikeys keyboard with a custom overlay, a touch screen, and/or 1-3 switches. The text and background colors can be modified for students with visual impairments. Introducing Fractions Slideshow- Flowering Fractions This online resource is a story of a girl and her father planting flowers that your children and you interact with. Help them fill in the fractions as they practice dividing the garden up for their flowers!

 Name Description Representing Half of a Circle This task continues "3.G Which pictures represent half of a circle?" moving into more complex shapes where geometric arguments about cutting or work using simple equivalences of fractions is required to analyze the picture. In order for students to be successful with this task, they need to understand that area is additive in the sense described in 3.G.7.d. Geometric pictures of one half 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. In order for students to be successful with this task, they need to understand that area is additive in the sense described in 3.G.7.d.

#### Virtual Manipulatives

 Name Description Exploring Fractions Match shapes and numbers to earn stars in this fractions game. Match fractions using numbers and pictures make the same fractions using different numbers Match fractions in different picture patterns Compare fractions using numbers and patterns Fraction Models An interactive tool to represent a fraction circle, rectangle, or set model with numerators and denominators ranging from 1 to 100. The decimal and percent equivalents of the created fraction are also displayed. Frank and Fran's Fabulous Fractions This online slideshow is another way to introduce parts of a whole to your class. This lesson could be presented to the whole class or completed by students independently.

#### Presentation/Slideshows

 Name Description Fractions: This is an accessible, easy-to-read book introducing fractions. It can be downloaded in PowerPoint, Impress, and Flash formats. For struggling or non-readers the book can be read aloud in a variety of voices. All of the books on the Tar Heel Reader site can be used with the Intellikeys keyboard with a custom overlay, a touch screen, and/or 1-3 switches. The text and background colors can be modified for students with visual impairments. Introducing Fractions Slideshow- Flowering Fractions: This online resource is a story of a girl and her father planting flowers that your children and you interact with. Help them fill in the fractions as they practice dividing the garden up for their flowers!

 Name Description Representing Half of a Circle: This task continues "3.G Which pictures represent half of a circle?" moving into more complex shapes where geometric arguments about cutting or work using simple equivalences of fractions is required to analyze the picture. In order for students to be successful with this task, they need to understand that area is additive in the sense described in 3.G.7.d. Geometric pictures of one half: 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. In order for students to be successful with this task, they need to understand that area is additive in the sense described in 3.G.7.d.

#### Virtual Manipulatives

 Name Description Exploring Fractions: Match shapes and numbers to earn stars in this fractions game. Match fractions using numbers and pictures make the same fractions using different numbers Match fractions in different picture patterns Compare fractions using numbers and patterns Frank and Fran's Fabulous Fractions: This online slideshow is another way to introduce parts of a whole to your class. This lesson could be presented to the whole class or completed by students independently.

#### Presentation/Slideshow

 Name Description Fractions: This is an accessible, easy-to-read book introducing fractions. It can be downloaded in PowerPoint, Impress, and Flash formats. For struggling or non-readers the book can be read aloud in a variety of voices. All of the books on the Tar Heel Reader site can be used with the Intellikeys keyboard with a custom overlay, a touch screen, and/or 1-3 switches. The text and background colors can be modified for students with visual impairments.