Moved - Area of irregular shapes.

[sachin]

Hello to all,
I was just thinking of investigating the idea of How can we share the idea of AREA of IRREGULAR shapes , to may be grade 4.
Is there any unique way of approaching, which I can put to use and derive the pleasure of learning with fun.

Warm Regards.

 

[JeffM]

Hello to all,
I was just thinking of investigating the idea of How can we share the idea of AREA of IRREGULAR shapes , to may be grade 4.
Is there any unique way of approaching, which I can put to use and derive the pleasure of learning with fun.

Warm Regards.

Rectilinear? That's easy. Such an area can be decomposed into triangles; that's why the area of triangles is so important.

 

[Deleted member 4993]

Hello to all,
I was just thinking of investigating the idea of How can we share the idea of AREA of IRREGULAR shapes , to may be grade 4.
Is there any unique way of approaching, which I can put to use and derive the pleasure of learning with fun.

Warm Regards.

It depends on what the 4 th grader knows about areas of regular shapes.

In general, we would need to approximate the contour of the shapes with straight lines.

Then break-up the irregular-area into multiple triangles.

First we may want to start with the concept that there are only three 2-D "regular" shapes that can be used over and over (tessellate), to cover a surface completly (triangle, rectangle and hexagon).