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Measuring and Drawing Angles with a Protractor By Christine Berg Edited By V Hamilton
Protractor Center Hole
Protractor Straight Edge
Protractor Curved Edge
Step 1: Place the center hole over the vertex of the angle
Step 2: Line up (make parallel) the straight edge with one side of the angle
Step 3: Find the point where the second side of the angle intersects with the curved edge
Step 4: Read the number on the protractor to find the measure of the angle
Drawing Angles with a Protractor
Step 1: Draw a ray with the straight edge of the protractor
Step 2: Place the center hole over the starting point of the ray
Step 3: Place a dot at the angle measure required
Step 3: Line up the straight edge over the starting point of the ray and the dot
Step 4: Draw a ray connecting the two marks. The point at which they meet is called the vertex
Try this: Draw an angle which measures 120 o
Answer: ^ >
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