Measuring Angles with a Protractor

This video tutorial by Marlene explains how to measure angles using a protractor. It covers the basic steps of aligning the protractor with the vertex and one ray, choosing the correct scale, and measuring angles. The tutorial also addresses measuring angles greater than 180 degrees by breaking them into parts. Additional resources are provided for further practice.

What tool is used to measure angles?

• Protractor

• Compass

• Stopwatch

• Ruler

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What unit is used to measure angles?

• Degrees

• Meters

• Centimeters

• Inches

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Where should the protractor be aligned to measure an angle?

• Outside the angle

• At the tip of the ray

• At the vertex of the angle

• At the end of the ray

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Which part of the protractor should line up with one of the rays?

• The top edge

• The right angle corner

• The curved edge

• The bottom horizontal line

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What is the first step in measuring an angle with a protractor?

• Choose a ray to align

• Place the protractor on the angle

• Find the vertex

• Decide which numbers to use

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When measuring an angle, where should you start counting from on a protractor?

• 180

• 100

• 10

• 0

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What should you always remember to include after measuring an angle?

• The word 'angle'

• The color of the protractor

• A drawing of the angle

• The measurement unit

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What should you do if a ray isn't clearly pointing to a number on the protractor?

• Estimate the angle

• Measure from the other ray

• Use a different protractor

• Extend the ray

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How do you measure an angle that is more than 180 degrees?

• Only use the inner numbers

• Guess the measurement

• Measure in parts and add them

• Use a larger protractor

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What do you add to the measurement to get the total angle if it's more than 180 degrees?

• 90 degrees

• 180 degrees

• The measurement of the rest of the angle

• 100 degrees

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