Write in standard form

This is an example

Write the first number 8.

Add a decimal point after it: 8.

Now count the number of digits after 8.

There are 13 digits.

So, in standard form: 81 900 000 000 000 is 8.19 × 10¹³

You have 2 sides that are 2 cms and you have 6 sides that are 1/2 cm and you have 4 sides that are 1 cm. the smallest sides are 1/2 the medium sized sides are 1 and the smallest are 1/2. so to find the perimeter you have to add them all up together so your answer will be 11 cm's