Using the formula: (number of sides -2)*180 = sum of interior angles
The sum of the angles in a quadrangle is 360 degrees, whatever the side lengths.
In general, you will need to use a protractor and measure them.
Measure the two sides adjacent to the angle and the diagonal at the far ends of these sides. Then use the cosine rule to calculate the angle.
Fold it in half diagonally.
By using a protractor or using trigonometry
i don't know it this helps, but the sum of the angles in a quadrangle is 360 !
The sum of the angles in a quadrangle is 360 degrees, whatever the side lengths.
The answer depends on what information is available but there is no simple solution. Using a protractor seems the best bet.
In general, you will need to use a protractor and measure them.
Measure the two sides adjacent to the angle and the diagonal at the far ends of these sides. Then use the cosine rule to calculate the angle.
Fold it in half diagonally.
By using a protractor or using trigonometry
You can never really be certain about the measure of an angle without using a protractor, or some similar tool. Usually, you can try to "eyeball" it, though. Just remember that a right angle is the same as an angle in a square. It is also a quarter of a whole revolution.
One way is to use a protractor. There are others
Depends how they ask you to look for it, using a protractor
a protractor
Assuming it is a four sided closed figure, the sum of the angles is always 360 degrees. For example, a rectangle has four sides with each angle equal to 90 degrees. If you add each of the angles together you come up with the sum of the angles totaling 360 degress.