In a right triangle, if angle $ONP$ is one of the non-right angles and the other non-right angle measures $50°$, what is the measure of angle $ONP$?

• A. $130°$
• B. $40°$
• C. $65°$
• D. $80°$

Answer: (B)

Verified step by step guidance

1. Recall that in any triangle, the sum of the interior angles is always \$180^\circ$.
2. Since the triangle is a right triangle, one of the angles is \$90^\circ$.
3. Let the measure of angle \(ONP\) be \(x\). The other non-right angle is given as \$50^\circ$.
4. Set up the equation for the sum of angles: \(x + 50^\circ + 90^\circ = 180^\circ\).
5. Solve for \(x\) by subtracting \$50^\circ\( and \)90^\circ\( from \)180^\circ\(: \)x = 180^\circ - 90^\circ - 50^\circ$.