Whats the supplementary angle of 121°?

The supplementary angle of 121 is 59°

Step-by-step explanation:

Supplementary, sum = 180°

so 180 - 21 = 59°

The supplementary angle of 121 is 59°

59°

Step-by-step explanation:

Two Angles are Supplementary when they add up to 180°.

x - the angle

We have the equation:

121° + x = 180°               subtract 121° from both sides

121° - 121° + x = 180° - 121°

x = 59°

1). Any decimal number that stops is a rational number, and even some
of them that never end are also rational (like 0.33333... is just 1/3.)

2). If 'x' is a perfect square, then the side of the square is the square root
of 'x', and that must be a counting number.  (Integers also include zero,
and it can't be zero, or else 'x' would also be zero.)

3). Sorry, but NONE of those four statements is true.

4). Irrational numbers are not a subset of rational numbers. 
They are a class all by themselves.