Missing lengths of a 45°-45°-90° Special Right Triangle given Hypotenuse length = 4

Leg lengths of a 45°-45°-90° Special Right Triangle are equal
Leg lengths =
Hypotenuse length/2

Leg lengths =
4/2

Rationalize to remove the radical from the denominator:
Leg lengths =
4 * √2/2 * √2

Leg lengths =
4√2/2

Leg lengths = 2√2 = 2.828427124746

The solution above and all other related solutions were provided by the 45°-45°-90° Special Right Triangle Application