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.
In general, you will need to use a protractor and measure them.
It is easy to draw an equilateral triangle without a protractor. That gives a 60 degree angle. It is then simply a matter of bisecting the 60 degree angle, using an unmarked rule and compass, to get a 30 degree angle.
One way is to use a protractor. There are others
Using the formula: (number of sides -2)*180 = sum of interior angles
I used a protractor to find the measure of the angle.
In general, you will need to use a protractor and measure them.
i don't know it this helps, but the sum of the angles in a quadrangle is 360 !
use the sun and silhoutte
It is easy to draw an equilateral triangle without a protractor. That gives a 60 degree angle. It is then simply a matter of bisecting the 60 degree angle, using an unmarked rule and compass, to get a 30 degree angle.
One way is to use a protractor. There are others
Using the formula: (number of sides -2)*180 = sum of interior angles
I used a protractor to find the measure of the angle.
With a protractor
With a protractor
A protractor.
The sum of the angles in a quadrangle is 360 degrees, whatever the side lengths.
use a protractor