The answer depends on the context. Angles are related in many ways: parallel lines, angles at a point, angles in a polygon - all impose constraints on angles from which their measure may be determined.
124 degrees
Polygons (regular, complex, irregular, etc) comes in many shapes, with a variety of interior angle totals. So the polygon in question needs to be more specifically named.
Are you talking about a triangle? If so, 33
The angles are all 90 degrees in a square.
Of what?
The answer will depend on what the shape is!
by using a protractor
The answer depends on the context. Angles are related in many ways: parallel lines, angles at a point, angles in a polygon - all impose constraints on angles from which their measure may be determined.
124 degrees
Polygons (regular, complex, irregular, etc) comes in many shapes, with a variety of interior angle totals. So the polygon in question needs to be more specifically named.
Are you talking about a triangle? If so, 33
The angles are all 90 degrees in a square.
If it's a triangle then: 180-sum of known angles = unknown angle
If it is a complementary angle, the missing angle is 52 degrees. If it is a supplementary angle, the missing angle is 142 degrees. If it is an opposite angle, the missing angle is 38 degrees. Obviously, you need to know what type of angle you're looking for.
The answer depends on what the angle is missing from!
An angle is acut if the internal measurement (the smallest one) is less then, but not equal to, 90 degrees. If the angle is 90 degrees, it is a right angle. If it is greater then 90 degrees, it is obtuse.