You should use a protractor.
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With a protractor or construct an equilateral triangle which has 3 equal interior angles of 60 degrees
A right triangle because all triangles equal 180 degrees. 180-60=120 120-30=90
draw a base and use this to draw an equilateral triangle each angle of an equilateral triangle adds up to 60 degrees. To have an angle of 120 degree use this angle and then draw another side of a triangle next to it to get a 120 degree angle.
An acute angle because it's greater than 0 but less than 90 degrees
There are 60 minutes of angle in one degree of angle.