Explanation

The sum of the angles in a triangle is always 180°. Let's use this fact to find the third angle:

Angle 1 = 65°

Angle 2 = 45°

Angle 3 = x° (unknown)

We know that Angle 1 + Angle 2 + Angle 3 = 180°

65° + 45° + x° = 180°

110° + x° = 180°

Subtract 110° from both sides:

x° = 70°

So, the correct answer is: 70°.