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Published byAlexandra Hernandez Modified over 2 years ago

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Measuring and Drawing Angles with a Protractor By Christine Berg Edited By V Hamilton

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Protractor Center Hole

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Protractor Straight Edge

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Protractor Curved Edge

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Step 1: Place the center hole over the vertex of the angle

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Step 2: Line up (make parallel) the straight edge with one side of the angle

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Step 3: Find the point where the second side of the angle intersects with the curved edge

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Step 4: Read the number on the protractor to find the measure of the angle

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Drawing Angles with a Protractor

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Step 1: Draw a ray with the straight edge of the protractor

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Step 2: Place the center hole over the starting point of the ray

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Step 3: Place a dot at the angle measure required

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Step 3: Line up the straight edge over the starting point of the ray and the dot

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Step 4: Draw a ray connecting the two marks. The point at which they meet is called the vertex

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Try this: Draw an angle which measures 120 o

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Answer: ^ >

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