If an angle measures $1°$, which of the following angles is supplementary to it?

• A. $179°$
• B. $90°$
• C. $89°$
• D. $1°$

Answer: (A)

Verified step by step guidance

1. Recall that supplementary angles are two angles whose measures add up to 180 degrees.
2. Given one angle measures \$1^\circ\(, let the supplementary angle be \)x^\circ$.
3. Set up the equation for supplementary angles: \$1^\circ + x^\circ = 180^\circ$.
4. Solve for \(x\) by subtracting \$1^\circ\( from both sides: \)x = 180^\circ - 1^\circ$.
5. Calculate \(x\) to find the measure of the supplementary angle.