# Lesson overview: Calculate the area of non-rectilinear shapes

In this lesson, we will estimate the area of shapes that are not rectangles and are presented on a grid. Then we will use a mixture of calculating the area of rectangles and counting the additional parts to estimate the total area.

### Transcript

### 10 lessons in 2-D shape, perimeter and area:

- Calculate and measure perimeter
- Calculate the area of rectangles
- Calculate the area of rectilinear shapes
- Compare the area and perimeter of rectangles
- Calculate the area of non-rectilinear shapes
- Comparing & classifying 2-d shapes
- Comparing & classifying quadrilaterals
- Comparing & classifying right angled triangles and equilateral triangles
- Comparing & classifying isosceles and scalene triangles
- Identifying lines of symmetry in 2D shapes