The important thing to grasp is the relationship between 1 and 4.
If you imagine a pyramid made of square blocks, which five blocks (units) high and has five blocks along its base (25 blocks). It isn't important that it be pointed at the top.
If you imagine a pyramid made of square blocks, which five blocks (units) high and has five blocks along its base (25 blocks). It isn't important that it be pointed at the top.
Diag 3
Diag 5 Centre of a Helium nucleus.
The circumference of a circle is the length around it. The circumference of a circle can be calculated from its diameter using the formula:
Or, substituting the radius for the diameter:
where r is the radius and d is the diameter of the circle, and the Greek letter π is defined as the ratio of the circumference of the circle to its diameter. The numerical value of π is 3.141 592 653