How do I draw a pentagon given length of the side 40mm vertically?

Try to find the difference between the wet-bulb and dry-bulb temperatures. After that, take the dry-bulb temperature and the difference you calculated, and where the columns meet on the chart...

The radius of a hexagon is the same as the side length, because the circle is inscribed in the hexagon. So just use the same formula and plug it in.

1/3rd of the length of the diagonal is the side of the hexagon. Using this, you can calculate the area.

You can use any of the methods described above. It doesn't matter if the point is on another line; technically, every point is on an infinite number of lines, even...

See Construct a Regular Pentagon.

The perimeter of a regular pentagon is the apothem multiplied by 7.267.

Each side of a regular pentagon is one-fifth of the perimeter. So in this case, each side measures 12.5 / 5 = 2.5.

There is no formula available for finding a side of an irregular pentagon.

A=area, L=length of 1 equal side, b=base, θ=HALF of angle between 2 equal sides. Split the triangle in half down the middle. The middle line is h, the height. Analyze...

Use the base times height for the rectangles, and the altitude times base of the hexagonal face times three.