Based on the triangle, we have the following information:
Hypotenuse = 34 units
Side opposite of the angle = 21 units
Angle = ?
To get the value of the missing angle, we will use sine function. The formula is:
Since we already have the values of the opposite side and hypotenuse, let's plug it in the function above.
Therefore, the measure of the missing angle is approximately 38 degrees.