# Unit: Area of 2-D shapes

## Lessons:

8 lessons

### Describing perimeters

In this lesson, you will use different units of length to describe perimeter; calculate the perimeter of polygons and estimate the perimeter of ‘curved’ shapes.

### Describing areas

In this lesson, you will use different square units to describe area and use informal counting strategies to calculate area.

### Cutting and combining shapes

In this lesson, you will analyse the effect of cutting, moving and combining shapes on area and perimeter.

### Exploring rectangles

In this lesson, you will explore the perimeter and area of rectangles as the dimensions change.

### Rectilinear shapes

In this lesson, you will learn to calculate the area (and perimeter) of rectilinear shapes by ‘combining’ rectangles.

### Area of parallelograms

In this lesson, you will learn to calculate the area of parallelograms by rearranging rectangles and you will arrive at a formula for the area of a parallelogram.

### Area of triangles

In this lesson, you will learn to calculate the area of triangles and link the area of triangles to the area of parallelograms.

### Further triangles

In this lesson, you will solve further problems involving area of triangles.