The angle protractor tool and 360° protractor give more precise measurements. We can also use a 360° protractor to draw a reflex angle.It is commonly used in the field of architecture, mechanical drawings, and meteorology. Therefore, ∠CAB = 40°.Ī 360° protractor is circular in shape and has readings up to 360° in the clockwise direction. Step 5: Now using a scale, join A and C.Step 4: In the inner readings, look for 40º and mark it as point C.Step 3: Since the angle is drawn on the right-hand side of the vertex we will see the inner readings.Step 2: Align the baseline of the protractor on AB such that the center of the protractor is placed on point A.Let us see how to draw an angle of 40º using a protractor. In order to draw angles using a protractor, we use the following steps. This can be verified by the values, that is, 150º + 30º = 180º. It should be noted that ∠AOC + ∠BOC form a straight line and hence add up to 180. Step 2: Check the reading where the ray OC is formed.Since we need to measure ∠AOC, which is formed on the left-hand side of the center, we will use the outer readings which go clockwise. Step 1: Place the baseline of the protractor on line AO such that the centre of the protractor is placed on vertex O.Now, let us find the measure of ∠AOC using the following steps. Step 3: Now, identify the reading on the protractor where ray C is extending.Step 2: Since the angle is formed on the right-hand side of the center, we will use the inner readings which go anti-clockwise.Step 1: In order to measure the angle ∠BOC, align the baseline of the protractor with the line AB such that the center circle of the protractor is at the vertex O.In this case, ∠BOC = 120°.įor measuring angles with a protractor, let us use the following steps and relate to the figure given below.
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