What is the measure of 3? triangle on right has angles labeled forty-four degrees, sixty-six degrees, and three.?

[1] First, remember that the sum of the angles in a triangle must add up to 180*.

[2] We are told two of the angles, 44 * and 66*, but we are missing the third.

[3] Combining [1] and [2], we know that 44 * + 66 * + ? = 180*. In other words,

110 * + ? = 180*

so,

? = 70*

The missing angle 3 is equal to 70 degrees.