In triangle PQR, PQ = PR and angle Q = 65°. Find angle P.
Answer: A
Since PQ = PR, the triangle is isosceles. The angles opposite the equal sides are equal. So, angle R = angle Q = 65°.
The sum of angles in a triangle is 180°.
Angle P + Angle Q + Angle R = 180°
Angle P + 65° + 65° = 180°
Angle P + 130° = 180°
Angle P = 50°.