Answer :
Using the right-angle theorem, the value of the missing angle is 48°.
Define right angle?
An angle that is 90 degrees is often referred to as a right angle. In our daily lives, it is the angle that is most frequently observed. It can be observed on the screens of mobile phones, the edges of boxes, and the corners of rooms.
A square or a rectangle's sides are always at a right angle to one another. It is denoted by the radian symbol π/2.
Here in the question,
The angle given here is a right angle.
That means the value of the angle is 90°.
Now a line dissects the angle.
One part of the angle is 42°.
The other part is 90° - 42° = 48°.
Therefore, the measure of the missing angle is 48°.
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