In a right triangle, one of the acute angles measures $10°$. What is the measure of the other acute angle?

• A. $100°$
• B. $70°$
• C. $90°$
• D. $80°$

Answer: (D)

Verified step by step guidance

1. Recall that the sum of the angles in any triangle is always \$180^\circ$.
2. In a right triangle, one angle is always \$90^\circ$ because it is a right angle.
3. The problem states that one of the acute angles measures \$10^\circ$.
4. To find the other acute angle, subtract the sum of the known angles from \$180^\circ\(: \)180^\circ - 90^\circ - 10^\circ$.
5. Simplify the expression to find the measure of the other acute angle.