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.
by using a protractor
Using a protractor is the simplest way of solving the measurements of angles.
Using the formula: (number of sides -2)*180 = sum of interior angles
Using a protractor helps
Angles are measured using a protractor
You can onlymeasure angles by using a protractor.
Protractor
by using a protractor
by using a protractor
By drawing regular polygons as for instance a square will have 4 equal right angles and an equilateral triangle will have 3 equal 60 degree angles.
To accurately measure angles using a protractor, place the center of the protractor on the vertex of the angle. Align one side of the angle with the zero line on the protractor. Read the measurement where the other side of the angle intersects the protractor scale.
A protractor is normally used to construct angles.
It is done out using a protractor.
Using a protractor is the simplest way of solving the measurements of angles.
Using the formula: (number of sides -2)*180 = sum of interior angles
Using a protractor helps
Angles are measured using a protractor