On Mon, 19 Sep 2016 03:44:01 +0000, DJ1111
m wrote:

I am building a ramp for my shed and need some help.
I to use *2x8 x 4ft* long as stringers and can not get the measurements right
to get the angles for the ground cut and the ledger cut.
The height from the ground to the floor is *10 inches*

Can some one help with this dilemma

Use a framing square. Use 24" mark on the long side and 5" mark on the
short side. That establishes the angle for a 5" drop in 24 or 10" in
48"