Table of Contents
Do you read the top or bottom numbers on a protractor?
To measure an angle you put the rough side of the protractor down then put the vertex of the angle in the little hole in the middle, (shown on pages 3 and 4) and if the angle is acute you use the numbers on the bottom on the right but if it is acute but it is pointing to the left you use the left side and the top ( …
How do you use a protractor step by step?
How to use a protractor
- Line up the vertex of the angle with the dot at the center of the protractor.
- Line up one side of the angle with 0 degrees on the protractor.
- Read the protractor to see where the other side of the angle crosses the number scale.
How do you find the degree of a protractor?
How to measure an angle with a protractor: Place the midpoint of the protractor on the VERTEX of the angle. Line up one side of the angle with the zero line of the protractor (where you see the number 0). Read the degrees where the other side crosses the number scale.
How do you draw an angle with a protractor?
To draw an angle with a protractor, proceed as follows: Draw a straight line (i.e. an arm of the angle). Place a dot at one end of the arm. Place the centre of the protractor at the vertex dot and the baseline of the protractor along the arm of the angle. Find the required angle on the scale and then mark a small dot at the edge of the protractor.
How to draw with a protractor?
Drawing an Angle with a Protractor Draw a straight line. The line is your reference line and the first leg of your angle. Place the origin of the protractor at one end of the line. This point will be your angle’s vertex. Find the degree of the angle you wish to draw on the protractor ‘s appropriate scale.
How do you measure an angle without using a protractor?
Measuring angles without a protractor is one of the fundamental aspects of geometry. Sine, cosine, and tangent are three concepts that will allow you to calculate an angle based solely on the lengths of two sides of a right triangle. You can form a right triangle out of any single angle with the help of a ruler and a pencil.
Do I need to use protractor?
How do you use a protractor step by step? Align one arm of the angle to be measured with the baseline of the protractor. Align the vertex with the center of the protractor. Carefully observe the reading on the protractor where the other ray is pointing.