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Listed under:  Mathematics  >  Geometry  >  Shapes (Geometry)  >  Polygons  >  Irregular polygons
Interactive resource

Exploring area and perimeter

Build a compound shape on a grid from shapes such as rectangles, semicircles and squares. Notice that the total area of the compound shape equals the sum of the areas of all of the component shapes. Build a rectangle to produce a given area and perimeter. Identify shapes used to form a compound shape. Calculate the area ...

Teacher resource

Using 'Area and perimeter' - Teacher idea

This Teacher idea relates the experiences of teaching R11472 'Area and perimeter - unit of work' both with students in a regular year 3 class and with others online in a virtual classroom. Through digital resources and hands-on tasks the unit explores the early concepts of perimeter and area, including the introduction ...

Teacher resource

Area and perimeter - unit of work

The unit allows students to explore the beginning concepts of perimeter and area, including the formal units of cm, m, cm sq, and m sq and to learn the differences between these measurements.

Teacher resource

We have it covered - unit of work

This unit allows students to explore the beginning concepts of area, including the formal units of cm, m, cm sq, and m sq.

Teacher resource

Living on the edge - unit of work

This unit allows students to explore the beginning concepts of perimeter, including the formal units of cm and m.

Text

BBC Bitesize: area - revision

This is a set of illustrated information sheets about the concept of area, and formulas for the calculation of areas of rectangles, triangles, parallelograms and compound shapes. Examples with answers are included and students have access to test questions to assess their learning. This resource is one of a series of online ...

Text

BBC Bitesize: compound shapes - revision

These illustrated information sheets revise ideas about area of triangles, rectangles, parallelograms and compound shapes. Examples with answers are included and students have access to a multiple-choice test to assess their learning. This is one of a collection of BBC-produced learning objects in the Bitesize series dealing ...

Interactive Resource

Area explorer

This is an interactive resource about calculating the area of a shape presented on a grid. Students are presented with a random figure and are required to calculate its area, in square units. Immediate feedback is provided and the student can make repeated attempts if a question is not answered correctly. The additional ...

Interactive Resource

Perimeter and area

This is a six-page HTML resource about solving problems with perimeter and area. It contains one video and nine questions, five of which are interactive. The resource discusses and explains solving problems with area and perimeter to reinforce students' understanding.

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Sizing Them Up

This resource is a web page containing a short task to explore area of irregular shapes by informal means. Arrange irregular shapes in size order smallest to largest. This resource is an activity from the NRICH website.

Moving Image

Exploring mysterious shapes

Join QuanQuan and Jenny as they explore some weird and wonderful shapes! While watching this clip, think about the sides, edges, surfaces and volumes of the shapes that are demonstrated. How are these shapes different from regular 2D and 3D forms?

Teacher resource

reSolve: Geometry: Trapezium Pieces

This lesson explores different shapes that can be formed by cutting a trapezium in two with one straight line. Students are challenged to classify and name the shapes that are made, and justify their classifications based on the definitions and properties of shapes. The lesson is outlined in detail including curriculum ...

Teacher resource

reSolve: Authentic Problems: Expanded Square

This sequence of four lessons explores concepts around informal area and symmetry. Students design an 'expanded square' where approximately half the area of the original square is flipped to the outside. The lessons provide opportunities for students to devise and use methods to informally measure area, record their mathematical ...

Teacher resource

reSolve: Rectilinear Polygons

In this sequence of three lessons, students use geometric reasoning to establish relationships between angles in polygons and go on to make generalisations using algebraic expressions. Students explore and enumerate right angles in a series of rectilinear polygons and generalise their findings. They then explore the number ...