If an angle measures $35°$, which angle is complementary to it?

• A. $45°$
• B. $125°$
• C. $145°$
• D. $55°$

Answer: (D)

Verified step by step guidance

1. Recall that complementary angles are two angles whose measures add up to 90 degrees.
2. Let the given angle be \( 35^\circ \). We need to find the angle \( x \) such that \( 35^\circ + x = 90^\circ \).
3. Set up the equation: \( x = 90^\circ - 35^\circ \).
4. Subtract the given angle from 90 degrees to find the complementary angle: \( x = 55^\circ \).
5. Therefore, the angle complementary to \( 35^\circ \) is \( 55^\circ \).