Both are most commonly in B-flat.
A marching euphonium does not resemble an upright concert euphonium, and is played standing and moving. It looks a lot like a large trumpet. Click to see an image of a marching euphonium.
Trumpet, French horn, Trombone, Baritone/Euphonium and Tuba.
you buzz into the metal mouth piece like you do in a trumpet, french horn and trombone
The brass family such as trumpet, cornet, french horn, euphonium and tuba.
French Horn, Trumpet, Cornet, Trombone, Tuba, Sousaphone, Baritone and Euphonium.
They are called valves on a trumpet.
French horn, trumpet, tuba, bar-sax (also part woodwind), baritone, euphonium (like baritone, but with straight top).
Some brass quintet music could probably be rearranged for that. The trombone and euphonium play in the same range.
They are not really keys...they are valves. There are three. Cheers :)
In an orchestra they are Trumpet Horn (Formally French Horn) Trombone Tuba In a Brass/Silver band Cornet Trombone Euphonium Tuba
Trumpet, French horn, trombone, tuba, in an orchestra; euphonium and baritone horn in a concert band; tenor horn and alto horn in a British-style brass band.
French Horn Tuba Trumpet Baritone Euphonium Trombone Cornet