Combining shapes differs from grouping objects; instead of maintaining a separate object identity for each shape involved in the complex shape, a single, indivisible shape is created. From the perspective of shape formatting, a combined shape is treated as a single object.

Shapes that have thichness is called a form.Forms are mostly 3 dimensional(3D) which means they have:

1.length

2.breath

3.height(depth)

Geometric forms are mosly symmetrical.Examples will be a cone,a cylinder.

Always remember that colours is the first thing ppl notice,hence it is veri important when designer wans to choose a colour for their product.

The Colour Wheel shows the relationship between colours. The relative positions of colours is an indication of how they will work together. Complementary schemes, for instance, are based on using colours that are opposite each other on the colour wheel. Harmonious schemes are based on colours near each other on the colour wheel. There are over two million recognisable colours and they can all be made from the primary colours in the colour wheel.

These are the colours:

Colours association

sometimes some colours are onli suitable some product.Examples will be bright colours are suitable for children's toys.

Textures

Different products have different textures.Some are rough while others are smooth.

the disk was smooth while the tyres are rough.

Sizes-big,tall,small,short,wide and narrow.This are all toking about sizes.

A good design-

1.should have good proportions when parts of different sizes look right together.